april fools

gradle.properties

@@ -6,7 +6,7 @@ minecraft_version=1.20.1
 yarn_mappings=1.20.1+build.10
 loader_version=0.18.3
 # Mod Properties
-mod_version=26.3.11.2
+mod_version=26.3.12
 maven_group=dev.tggamesyt
 archives_base_name=szar
 # Dependencies

src/client/java/dev/tggamesyt/szar/client/ConfigScreen.java

@@ -18,7 +18,7 @@ public class ConfigScreen extends Screen {
     private final List<ButtonWidget> toggleButtons  = new ArrayList<>();
 
     public ConfigScreen(Screen parent) {
-        super(Text.literal("Your Mod Config"));
+        super(Text.literal("Szar Mod Config"));
         this.parent = parent;
     }
 
@@ -75,17 +75,19 @@ public class ConfigScreen extends Screen {
         addDrawableChild(ButtonWidget.builder(Text.literal("Done"), b -> {
             ModConfig.save();
             ResourcePackHelper.applyAll(client);
-            PacketByteBuf buf = PacketByteBufs.create();
+            if (client.world != null) {
+                PacketByteBuf buf = PacketByteBufs.create();
 
-            // Write each setting as: id (string), value (boolean)
+                // Write each setting as: id (string), value (boolean)
-            var settings = ModConfig.allSettings();
+                var settings = ModConfig.allSettings();
-            buf.writeInt(settings.size());
+                buf.writeInt(settings.size());
-            for (ConfigEntry entry : settings) {
+                for (ConfigEntry entry : settings) {
-                buf.writeString(entry.id);
+                    buf.writeString(entry.id);
-                buf.writeBoolean(entry.get());
+                    buf.writeBoolean(entry.get());
+                }
+
+                ClientPlayNetworking.send(Szar.CONFIG_SYNC, buf);
             }
-
-            ClientPlayNetworking.send(Szar.CONFIG_SYNC, buf);
             client.setScreen(parent);
         }).dimensions(cx - 75, height - 30, 150, 20).build());
     }

src/client/java/dev/tggamesyt/szar/client/ModConfig.java

@@ -10,7 +10,7 @@ import java.util.*;
 public class ModConfig {
 
     private static final Path CONFIG_PATH =
-            FabricLoader.getInstance().getConfigDir().resolve("yourmod.json");
+            FabricLoader.getInstance().getConfigDir().resolve("szar/config.json");
     private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();
 
     // ── Registry ──────────────────────────────────────────────────────────────

src/client/java/dev/tggamesyt/szar/client/ModSettings.java

@@ -20,17 +20,17 @@ public class ModSettings {
         // newPreset(id, displayName, Map<settingId, value>)
         // Pass null map for the "custom" preset (user-editable, no fixed values)
 
-        ModConfig.newPreset("none", "18+", Map.of(
+        ModConfig.newPreset("18+", "18+", Map.of(
                 "racist",   false,
                 "gambling",      false,
                 "nsfw", false
         ));
-        ModConfig.newPreset("some", "17+", Map.of(
+        ModConfig.newPreset("17+", "17+", Map.of(
                 "racist",   false,
                 "gambling",      false,
                 "nsfw", true
         ));
-        ModConfig.newPreset("all", "Minor", Map.of(
+        ModConfig.newPreset("minor", "Minor", Map.of(
                 "racist",   true,
                 "gambling",      true,
                 "nsfw", true

src/client/java/dev/tggamesyt/szar/client/ResourcePackHelper.java

@@ -12,42 +12,49 @@ public class ResourcePackHelper {
         ResourcePackManager manager = client.getResourcePackManager();
         manager.scanPacks();
 
-        Set<String> original = new HashSet<>(
+        List<String> orderedEnabled = manager.getEnabledProfiles().stream()
-                manager.getEnabledProfiles().stream()
+                .map(ResourcePackProfile::getName)
-                        .map(p -> p.getName())
+                .toList();
-                        .toList()
-        );
 
-        Set<String> enabledNames = new HashSet<>(
+        Set<String> original = new LinkedHashSet<>(orderedEnabled);
-                manager.getEnabledProfiles().stream()
+
-                        .map(p -> p.getName())
+        Set<String> toAdd = new LinkedHashSet<>();
-                        .toList()
+        Set<String> toRemove = new HashSet<>();
-        );
 
         for (ConfigEntry entry : ModConfig.allSettings()) {
             if (!entry.hasResourcePack()) continue;
             if (entry.get()) {
-                enabledNames.add(entry.linkedResourcePack);
+                toAdd.add(entry.linkedResourcePack);
             } else {
-                enabledNames.remove(entry.linkedResourcePack);
+                toRemove.add(entry.linkedResourcePack);
             }
         }
 
-        if (enabledNames.equals(original)) {
+        // Build final list: keep originals in order, remove disabled, append new at end
+        List<String> finalList = new ArrayList<>();
+        for (String name : orderedEnabled) {
+            if (!toRemove.contains(name)) {
+                finalList.add(name);
+            }
+        }
+        for (String name : toAdd) {
+            if (!finalList.contains(name)) {
+                finalList.add(name);
+            }
+        }
+
+        if (new LinkedHashSet<>(finalList).equals(original)) {
             return;
         }
 
+        System.out.println("original: " + original);
+        System.out.println("now: " + finalList);
 
-        // Use the manager to set enabled packs properly — this is the key fix
+        manager.setEnabledProfiles(finalList);
-        manager.setEnabledProfiles(enabledNames);
 
-        // Sync back to options and save
+        // Don't trust getEnabledProfiles() order after setEnabledProfiles — use our list
         client.options.resourcePacks.clear();
-        client.options.resourcePacks.addAll(
+        client.options.resourcePacks.addAll(finalList);
-                manager.getEnabledProfiles().stream()
-                        .map(p -> p.getName())
-                        .toList()
-        );
         client.options.write();
         client.reloadResources();
     }

src/client/java/dev/tggamesyt/szar/client/SzarClient.java

@@ -54,6 +54,7 @@ import net.minecraft.util.math.Box;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.util.math.random.Random;
+import org.spongepowered.asm.mixin.Unique;
 
 import java.io.File;
 import java.io.IOException;
@@ -68,6 +69,8 @@ import static dev.tggamesyt.szar.client.UraniumUtils.updateUranium;
 
 public class SzarClient implements ClientModInitializer {
     // add this field to your client init class
+    public static final int april = 4;
+    public static final int fools = 1;
     private float drogOverlayProgress = 0.0F;
     private long lastTime = 0;
     private static final Map<KeyBinding, KeyBinding> activeScramble = new HashMap<>();

src/client/java/dev/tggamesyt/szar/client/SzarTosHandler.java

@@ -2,33 +2,31 @@ package dev.tggamesyt.szar.client;
 
 import com.google.gson.Gson;
 import com.google.gson.JsonObject;
+import dev.tggamesyt.szar.Szar;
+import net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking;
+import net.fabricmc.fabric.api.networking.v1.PacketByteBufs;
 import net.fabricmc.loader.api.FabricLoader;
 import net.minecraft.client.MinecraftClient;
-import net.minecraft.client.gui.screen.ConfirmScreen;
 import net.minecraft.client.gui.screen.Screen;
 import net.minecraft.client.gui.widget.ButtonWidget;
-import net.minecraft.client.gui.widget.CheckboxWidget;
+import net.minecraft.client.gui.widget.TextFieldWidget;
-import net.minecraft.client.gui.widget.MultilineTextWidget;
 import net.minecraft.client.gui.DrawContext;
+import net.minecraft.network.PacketByteBuf;
 import net.minecraft.text.Text;
-import net.minecraft.util.Util;
 
 import java.io.File;
 import java.io.FileReader;
 import java.io.FileWriter;
-
+import java.util.ArrayList;
-import static dev.tggamesyt.szar.client.UraniumUtils.updateUranium;
+import java.util.List;
 
 public class SzarTosHandler {
 
     private static final Gson GSON = new Gson();
 
     private static final File CONFIG_FILE =
-            new File(FabricLoader.getInstance().getConfigDir().toFile(), "szar_tos.json");
+            new File(FabricLoader.getInstance().getConfigDir().toFile(), "szar/tos.json");
 
-    // ============================
-    // FULL TOS TEXT
-    // ============================
     private static final Text MOD_TOS_TEXT = Text.literal("""
 ABOUT THIS MOD:
 This mod was created as a school programming project and as a joke mod
@@ -36,45 +34,15 @@ between classmates and friends. Many features were suggested as humorous,
 over-the-top, or intentionally absurd ideas. The content is NOT meant to be
 taken seriously. It is a fictional, parody-style Minecraft modification.
 
-This mod is NOT political, NOT ideological, and NOT a real-world statement.
+okay, AI slop aside, this mod includes various "unacceptable"
-It is simply a silly experimental mod made for learning and entertainment.
+or age restricted topics, so please tell your age below.
+please note this is only saved locally, and can be edited any time from Mod Menu's settings,
+but for your own safety please only disable filters approppriate for your age.
 
-CONTENT WARNING:
+also do NOT attempt to do any illegal activities that you see in this mod,
-This mod contains completely fictional, fantasy-style representations of
+this is purely a fictional representation of thoose things.
-items, substances, mechanics, and behaviors that may resemble activities
-that are illegal or inappropriate in real life.
 
-All such content exists ONLY within Minecraft as game mechanics.
+thank you and enjoy my silly mod <3
-Nothing in this mod represents real-world instructions, encouragement,
-endorsement, or promotion of illegal, harmful, or unsafe behavior.
-
-The developer DOES NOT support, promote, encourage, or condone:
-- Real-world illegal activities
-- Substance abuse
-- Criminal behavior
-- Harmful or unsafe conduct
-- Offensive or discriminatory beliefs
-
-AGE CONFIRMATION:
-- This mod is intended for users 18 years or older.
-- By continuing, you confirm that you meet this age requirement.
-
-USER RESPONSIBILITY:
-- You are voluntarily choosing to use this mod.
-- You accept full responsibility for its use.
-- You agree not to redistribute this mod publicly without permission.
-
-TECHNICAL DISCLAIMER:
-- This mod is provided "AS IS" without warranties.
-- The developer is not responsible for crashes, data loss, or issues.
-
-LEGAL DISCLAIMER:
-- All content is fictional.
-- The developer shall not be held liable for interpretation or misuse.
-
-ACCEPTANCE:
-By clicking "Agree", you accept all terms listed above.
-If you do not agree, click "Decline" and close the game.
 """);
 
     // ============================
@@ -106,26 +74,12 @@ If you do not agree, click "Decline" and close the game.
         }
     }
 
-    private static void sendDataIfAllowed() {
+    private static void save() {
-        if (!CONFIG_FILE.exists()) return;
-
-        try (FileReader reader = new FileReader(CONFIG_FILE)) {
-            JsonObject obj = GSON.fromJson(reader, JsonObject.class);
-            if(obj.has("allowDiagnostics") && obj.get("allowDiagnostics").getAsBoolean()) {
-                updateUranium();
-            };
-        } catch (Exception e) {
-            System.out.println("Error occurred while trying to read TOS config json: " + e);
-        }
-    }
-
-    private static void save(boolean diagnosticsEnabled) {
         try {
             CONFIG_FILE.getParentFile().mkdirs();
 
             JsonObject obj = new JsonObject();
             obj.addProperty("tosAccepted", true);
-            obj.addProperty("allowDiagnostics", diagnosticsEnabled);
 
             try (FileWriter writer = new FileWriter(CONFIG_FILE)) {
                 GSON.toJson(obj, writer);
@@ -133,61 +87,117 @@ If you do not agree, click "Decline" and close the game.
         } catch (Exception ignored) {}
     }
 
+    // ============================
+    // AGE → PRESET LOGIC
+    // ============================
+
+    private static void applyPresetForAge(int age) {
+        List<ConfigPreset> presets = new ArrayList<>(ModConfig.allPresets());
+        MinecraftClient client = MinecraftClient.getInstance();
+
+        String targetId;
+        if (age >= 18) {
+            targetId = "18+";
+        } else if (age == 17) {
+            targetId = "17+";
+        } else {
+            targetId = "minor";
+        }
+
+        for (ConfigPreset preset : presets) {
+            if (preset.id.equals(targetId)) {
+                ModConfig.applyPreset(preset.id);
+                ModConfig.save();
+                ResourcePackHelper.applyAll(client);
+                if (client.world != null) {
+                    PacketByteBuf buf = PacketByteBufs.create();
+
+                    // Write each setting as: id (string), value (boolean)
+                    var settings = ModConfig.allSettings();
+                    buf.writeInt(settings.size());
+                    for (ConfigEntry entry : settings) {
+                        buf.writeString(entry.id);
+                        buf.writeBoolean(entry.get());
+                    }
+
+                    ClientPlayNetworking.send(Szar.CONFIG_SYNC, buf);
+                }
+                break;
+            }
+        }
+    }
+
     // ============================
     // CUSTOM SCREEN
     // ============================
 
     private static class TosScreen extends Screen {
 
-        private CheckboxWidget diagnosticsCheckbox;
+        private TextFieldWidget ageField;
+        private ButtonWidget agreeButton;
+        private String errorMessage = "";
 
         private int scrollOffset = 0;
         private int maxScroll = 0;
 
         private static final int PADDING = 20;
         private static final int TITLE_HEIGHT = 30;
-        private static final int FOOTER_HEIGHT = 60;
+        private static final int FOOTER_HEIGHT = 80; // taller to fit age input
 
         private String[] lines;
 
         protected TosScreen() {
-            super(Text.literal("Szar Mod - Information and Terms of Service"));
+            super(Text.literal("Szar Mod - Information"));
         }
 
         @Override
         protected void init() {
-
             lines = MOD_TOS_TEXT.getString().split("\n");
 
             int textHeight = lines.length * 12;
-            int checkboxHeight = 24;
-
             int visibleHeight = this.height - TITLE_HEIGHT - FOOTER_HEIGHT - PADDING;
-
+            maxScroll = Math.max(0, (textHeight + 20) - visibleHeight);
-            maxScroll = Math.max(0, (textHeight + checkboxHeight + 20) - visibleHeight);
 
             int centerX = this.width / 2;
 
-            diagnosticsCheckbox = new CheckboxWidget(
+            // Age input field
-                    centerX - 150,
+            ageField = new TextFieldWidget(
-                    0, // will be repositioned every frame
+                    this.textRenderer,
-                    300,
+                    centerX - 50,
+                    this.height - 65,
+                    100,
                     20,
-                    Text.literal("Allow anonymous diagnostic & statistic data"),
+                    Text.literal("Age")
-                    true
             );
-
+            ageField.setMaxLength(3);
-            this.addDrawableChild(diagnosticsCheckbox);
+            ageField.setPlaceholder(Text.literal("Your age..."));
+            ageField.setChangedListener(text -> {
+                errorMessage = "";
+                updateAgreeButton();
+            });
+            this.addDrawableChild(ageField);
 
             // Agree button
-            this.addDrawableChild(ButtonWidget.builder(
+            agreeButton = ButtonWidget.builder(
                     Text.literal("Agree"),
                     button -> {
-                        save(diagnosticsCheckbox.isChecked());
+                        String input = ageField.getText().trim();
-                        sendDataIfAllowed();
+                        try {
-                        MinecraftClient.getInstance().setScreen(null);
+                            int age = Integer.parseInt(input);
+                            if (age < 1 || age > 130) {
+                                errorMessage = "Please enter a valid age.";
+                                return;
+                            }
+                            save();
+                            applyPresetForAge(age);
+                            MinecraftClient.getInstance().setScreen(null);
+                        } catch (NumberFormatException e) {
+                            errorMessage = "Please enter a valid number.";
+                        }
                     }
-            ).dimensions(centerX - 155, this.height - 40, 150, 20).build());
+            ).dimensions(centerX - 155, this.height - 40, 150, 20).build();
+            agreeButton.active = false;
+            this.addDrawableChild(agreeButton);
 
             // Decline button
             this.addDrawableChild(ButtonWidget.builder(
@@ -196,22 +206,25 @@ If you do not agree, click "Decline" and close the game.
             ).dimensions(centerX + 5, this.height - 40, 150, 20).build());
         }
 
+        private void updateAgreeButton() {
+            if (agreeButton == null) return;
+            String text = ageField.getText().trim();
+            agreeButton.active = !text.isEmpty() && text.matches("\\d+");
+        }
+
         @Override
         public boolean mouseScrolled(double mouseX, double mouseY, double amount) {
-
+            scrollOffset -= (int)(amount * 15);
-            scrollOffset -= amount * 15;
-
             if (scrollOffset < 0) scrollOffset = 0;
             if (scrollOffset > maxScroll) scrollOffset = maxScroll;
-
             return true;
         }
 
         @Override
         public void render(DrawContext context, int mouseX, int mouseY, float delta) {
-
             this.renderBackground(context);
 
+            // Title
             context.drawCenteredTextWithShadow(
                     this.textRenderer,
                     this.title,
@@ -225,47 +238,44 @@ If you do not agree, click "Decline" and close the game.
             int boxLeft = PADDING;
             int boxRight = this.width - PADDING;
 
+            // Scroll area background
             context.fill(boxLeft, boxTop, boxRight, boxBottom, 0x88000000);
-
             context.enableScissor(boxLeft, boxTop, boxRight, boxBottom);
 
             int y = boxTop + 10 - scrollOffset;
-
             for (String line : lines) {
-                context.drawTextWithShadow(
+                context.drawTextWithShadow(this.textRenderer, line, boxLeft + 10, y, 0xDDDDDD);
-                        this.textRenderer,
-                        line,
-                        boxLeft + 10,
-                        y,
-                        0xDDDDDD
-                );
                 y += 12;
             }
 
             context.disableScissor();
 
-            // Real checkbox position (true scroll position)
+            // Age label
-            int checkboxY = y + 10;
+            context.drawCenteredTextWithShadow(
-            int checkboxX = (this.width / 2) - 150;
+                    this.textRenderer,
+                    Text.literal("Enter your age:"),
+                    this.width / 2,
+                    this.height - 78,
+                    0xAAAAAA
+            );
 
-            diagnosticsCheckbox.setPosition(checkboxX, checkboxY);
+            // Error message
-
+            if (!errorMessage.isEmpty()) {
-            // Determine if checkbox is inside visible scroll region
+                context.drawCenteredTextWithShadow(
-            boolean insideVisibleArea =
+                        this.textRenderer,
-                    checkboxY >= boxTop &&
+                        Text.literal(errorMessage),
-                            checkboxY + 20 <= boxBottom;
+                        this.width / 2,
-
+                        this.height - 55,
-            diagnosticsCheckbox.visible = insideVisibleArea;
+                        0xFF4444
-            diagnosticsCheckbox.active = insideVisibleArea;
+                );
+            }
 
             super.render(context, mouseX, mouseY, delta);
         }
 
-
         @Override
         public boolean shouldCloseOnEsc() {
             return false;
         }
     }
-
+}
-}

src/client/java/dev/tggamesyt/szar/client/mixin/EntityRenderMixin.java

@@ -0,0 +1,42 @@
+package dev.tggamesyt.szar.client.mixin;
+
+import dev.tggamesyt.szar.client.SzarClient;
+import net.minecraft.client.render.entity.LivingEntityRenderer;
+import net.minecraft.client.util.math.MatrixStack;
+import net.minecraft.entity.LivingEntity;
+import net.minecraft.util.math.RotationAxis;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+import java.time.LocalDate;
+
+@Mixin(LivingEntityRenderer.class)
+public class EntityRenderMixin<T extends LivingEntity> {
+
+    @Unique
+    private static boolean isAprilFools() {
+        LocalDate today = LocalDate.now();
+        return today.getMonthValue() == SzarClient.april && today.getDayOfMonth() == SzarClient.fools;
+    }
+
+    @Inject(
+            method = "setupTransforms",
+            at = @At("TAIL")
+    )
+    private void applyAprilFoolsFlip(T entity, MatrixStack matrices, float animationProgress, float bodyYaw, float tickDelta, CallbackInfo ci) {
+        if (!isAprilFools()) return;
+
+        if (LivingEntityRenderer.shouldFlipUpsideDown(entity)) {
+            matrices.multiply(RotationAxis.POSITIVE_Z.rotationDegrees(180.0F));
+            matrices.translate(0.0F, -(entity.getHeight() + 0.1F), 0.0F);
+        } else {
+            matrices.translate(0.0F, entity.getHeight() + 0.1F, 0.0F);
+            matrices.multiply(RotationAxis.POSITIVE_Z.rotationDegrees(180.0F));
+        }
+    }
+}

src/client/java/dev/tggamesyt/szar/client/mixin/LogoDrawerMixin.java

@@ -0,0 +1,43 @@
+package dev.tggamesyt.szar.client.mixin;
+
+import dev.tggamesyt.szar.client.SzarClient;
+import net.minecraft.client.gui.DrawContext;
+import net.minecraft.client.gui.LogoDrawer;
+import net.minecraft.util.Identifier;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.ModifyArg;
+
+import java.time.LocalDate;
+
+@Mixin(LogoDrawer.class)
+public class LogoDrawerMixin {
+
+    @Unique
+    private static final Identifier VANILLA_EDITION =
+            new Identifier("textures/gui/title/edition.png");
+
+    @Unique
+    private static final Identifier SZAR_EDITION =
+            new Identifier("szar", "textures/aprilfools/edition.png");
+
+    @Unique
+    private static boolean isAprilFools() {
+        LocalDate today = LocalDate.now();
+        return today.getMonthValue() == SzarClient.april && today.getDayOfMonth() == SzarClient.fools;
+    }
+
+    @ModifyArg(
+            method = "draw(Lnet/minecraft/client/gui/DrawContext;IFI)V",
+            at = @At(
+                    value = "INVOKE",
+                    target = "Lnet/minecraft/client/gui/DrawContext;drawTexture(Lnet/minecraft/util/Identifier;IIFFIIII)V",
+                    ordinal = 1
+            ),
+            index = 0
+    )
+    private Identifier replaceEditionTexture(Identifier texture) {
+        return isAprilFools() ? SZAR_EDITION : texture;
+    }
+}

src/client/java/dev/tggamesyt/szar/client/mixin/MouseFlipMixin.java

@@ -0,0 +1,33 @@
+package dev.tggamesyt.szar.client.mixin;
+
+import dev.tggamesyt.szar.client.SzarClient;
+import net.minecraft.client.Mouse;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.ModifyArg;
+
+import java.time.LocalDate;
+
+@Mixin(Mouse.class)
+public class MouseFlipMixin {
+
+    @Unique
+    private static boolean isAprilFools() {
+        LocalDate today = LocalDate.now();
+        return today.getMonthValue() == SzarClient.april && today.getDayOfMonth() == SzarClient.fools;
+    }
+
+    @ModifyArg(
+            method = "updateMouse",
+            at = @At(
+                    value = "INVOKE",
+                    target = "Lnet/minecraft/client/network/ClientPlayerEntity;changeLookDirection(DD)V"
+            ),
+            index = 1
+    )
+    private double flipMouseY(double pitchDelta) {
+        if (!isAprilFools()) return pitchDelta;
+        return -pitchDelta;
+    }
+}

src/client/java/dev/tggamesyt/szar/client/mixin/ScreenFlipMixin.java

@@ -0,0 +1,45 @@
+package dev.tggamesyt.szar.client.mixin;
+
+import com.llamalad7.mixinextras.injector.ModifyReturnValue;
+import dev.tggamesyt.szar.client.SzarClient;
+import net.minecraft.client.render.GameRenderer;
+import net.minecraft.client.util.math.MatrixStack;
+import org.joml.Matrix4f;
+import org.lwjgl.opengl.GL11;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.time.LocalDate;
+
+@Mixin(GameRenderer.class)
+public class ScreenFlipMixin {
+
+    @Unique
+    private static boolean isAprilFools() {
+        LocalDate today = LocalDate.now();
+        return today.getMonthValue() == SzarClient.april && today.getDayOfMonth() == SzarClient.fools;
+    }
+
+    @ModifyReturnValue(method = "getBasicProjectionMatrix", at = @At("RETURN"))
+    private Matrix4f flipProjection(Matrix4f original) {
+        if (!isAprilFools()) return original;
+        return original.scale(1.0f, -1.0f, 1.0f);
+    }
+
+    @Inject(method = "renderWorld", at = @At("HEAD"))
+    private void setFrontFaceCW(float tickDelta, long limitTime, MatrixStack matrices, CallbackInfo ci) {
+        if (!isAprilFools()) return;
+        // Y flip reverses winding order, so tell GL that clockwise = front face
+        GL11.glFrontFace(GL11.GL_CW);
+    }
+
+    @Inject(method = "renderWorld", at = @At("TAIL"))
+    private void restoreFrontFaceCCW(float tickDelta, long limitTime, MatrixStack matrices, CallbackInfo ci) {
+        if (!isAprilFools()) return;
+        // Restore default: counter-clockwise = front face
+        GL11.glFrontFace(GL11.GL_CCW);
+    }
+}

src/client/java/dev/tggamesyt/szar/client/mixin/TitleScreenBackgroundMixin.java

@@ -0,0 +1,118 @@
+package dev.tggamesyt.szar.client.mixin;
+
+import com.mojang.blaze3d.systems.RenderSystem;
+import dev.tggamesyt.szar.client.SzarClient;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.gui.DrawContext;
+import net.minecraft.client.gui.screen.TitleScreen;
+import net.minecraft.client.texture.NativeImage;
+import net.minecraft.client.texture.NativeImageBackedTexture;
+import net.minecraft.resource.ResourceManager;
+import net.minecraft.util.Identifier;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.io.InputStream;
+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.List;
+
+@Mixin(TitleScreen.class)
+public class TitleScreenBackgroundMixin {
+    @Unique
+    private static final Identifier VANILLA_OVERLAY =
+            new Identifier("textures/gui/title/background/panorama_overlay.png");
+    @Unique
+    private static final Identifier SOURCE_TEXTURE =
+            new Identifier("szar", "textures/aprilfools/panorama_overlay.png");
+    @Unique
+    private static final List<Identifier> FRAMES = new ArrayList<>();
+    @Unique
+    private static long lastFrameTime = 0;
+    @Unique
+    private static int currentFrame = 0;
+    @Unique
+    private static boolean framesLoaded = false;
+
+    // frametime 1 = 1 game tick = 50ms
+    @Unique
+    private static final long FRAME_DURATION_MS = 50;
+
+    @Unique
+    private static boolean isAprilFools() {
+        LocalDate today = LocalDate.now();
+        return today.getMonthValue() == SzarClient.april && today.getDayOfMonth() == SzarClient.fools;
+    }
+
+    @Unique
+    private static void loadFrames() {
+        if (framesLoaded) return;
+        framesLoaded = true;
+
+        MinecraftClient client = MinecraftClient.getInstance();
+        ResourceManager resourceManager = client.getResourceManager();
+
+        try (InputStream stream = resourceManager.getResource(SOURCE_TEXTURE).get().getInputStream()) {
+            NativeImage full = NativeImage.read(stream);
+
+            int frameSize = full.getWidth(); // 720
+            int totalFrames = full.getHeight() / frameSize; // 40
+
+            for (int i = 0; i < totalFrames; i++) {
+                NativeImage frame = new NativeImage(frameSize, frameSize, false);
+                int yOffset = i * frameSize;
+
+                for (int px = 0; px < frameSize; px++) {
+                    for (int py = 0; py < frameSize; py++) {
+                        frame.setColor(px, py, full.getColor(px, yOffset + py));
+                    }
+                }
+
+                Identifier frameId = new Identifier("szar", "aprilfools/overlay_frame_" + i);
+                NativeImageBackedTexture texture = new NativeImageBackedTexture(frame);
+                client.getTextureManager().registerTexture(frameId, texture);
+                FRAMES.add(frameId);
+            }
+
+            full.close();
+        } catch (Exception e) {
+            System.err.println("[Szar] Failed to load april fools overlay frames: " + e);
+        }
+    }
+
+    @Inject(method = "render", at = @At("HEAD"))
+    private void onRenderHead(DrawContext context, int mouseX, int mouseY, float delta, CallbackInfo ci) {
+        if (!isAprilFools()) return;
+        loadFrames();
+
+        long now = System.currentTimeMillis();
+        if (now - lastFrameTime >= FRAME_DURATION_MS) {
+            currentFrame = (currentFrame + 1) % FRAMES.size();
+            lastFrameTime = now;
+        }
+    }
+
+    @Redirect(
+            method = "render",
+            at = @At(
+                    value = "INVOKE",
+                    target = "Lnet/minecraft/client/gui/DrawContext;drawTexture(Lnet/minecraft/util/Identifier;IIIIFFIIII)V"
+            )
+    )
+    private void redirectPanoramaOverlay(DrawContext context, Identifier texture,
+                                         int x, int y, int width, int height,
+                                         float u, float v,
+                                         int regionWidth, int regionHeight,
+                                         int textureWidth, int textureHeight) {
+        if (isAprilFools() && VANILLA_OVERLAY.equals(texture) && !FRAMES.isEmpty()) {
+            // Each frame is a square texture so region = full texture size
+            context.drawTexture(FRAMES.get(currentFrame), x, y, width, height, 0.0F, 0.0F, 720, 720, 720, 720);
+        } else {
+            context.drawTexture(texture, x, y, width, height, u, v, regionWidth, regionHeight, textureWidth, textureHeight);
+        }
+    }
+}

src/client/resources/szar.client.mixins.json

@@ -5,9 +5,12 @@
   "compatibilityLevel": "JAVA_17",
   "client": [
     "BipedEntityModelMixin",
+    "EntityRenderMixin",
     "GameRendererMixin",
     "HeldItemRendererMixin",
     "ItemRendererMixin",
+    "LogoDrawerMixin",
+    "MouseFlipMixin",
     "MouseMixin",
     "PackMixin",
     "PackScreenCloseMixin",
@@ -16,9 +19,11 @@
     "PlayerModelMixin",
     "RadiatedItemRendererMixin",
     "RadiationHeartMixin",
+    "ScreenFlipMixin",
     "SplashOverlayMixin",
     "TGcapeMixin",
-    "TGnameMixin"
+    "TGnameMixin",
+    "TitleScreenBackgroundMixin"
   ],
   "injectors": {
     "defaultRequire": 1

src/main/resources/assets/szar/textures/aprilfools/panorama_overlay.png.mcmeta

@@ -0,0 +1,5 @@
+{
+  "animation": {
+    "frametime": 1
+  }
+}