Make the sky red when raging

src/main/java/com/minelittlepony/unicopia/client/render/WorldRenderDelegate.java

@@ -25,6 +25,7 @@ import net.minecraft.util.math.*;
 
 public class WorldRenderDelegate {
     public static final WorldRenderDelegate INSTANCE = new WorldRenderDelegate();
+    private static final Optional<Vec3d> RED_SKY_COLOR = Optional.of(new Vec3d(1, 0, 0));
 
     private final EntityReplacementManager disguiseLookup = new EntityReplacementManager();
     private final EntityDisguiseRenderer disguiseRenderer = new EntityDisguiseRenderer(this);
@@ -35,6 +36,13 @@ public class WorldRenderDelegate {
 
     final MinecraftClient client = MinecraftClient.getInstance();
 
+    public Optional<Vec3d> getSkyColor(float tickDelta) {
+        if (EquinePredicates.RAGING.test(client.player)) {
+            return RED_SKY_COLOR;
+        }
+        return Optional.empty();
+    }
+
     public boolean beforeEntityRender(Entity entity,
             double x, double y, double z, float yaw,
             float tickDelta, MatrixStack matrices, VertexConsumerProvider vertices, int light) {

src/main/java/com/minelittlepony/unicopia/mixin/client/MixinClientWorld.java

@@ -0,0 +1,20 @@
+package com.minelittlepony.unicopia.mixin.client;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+import com.minelittlepony.unicopia.client.render.WorldRenderDelegate;
+
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.util.math.Vec3d;
+
+@Mixin(ClientWorld.class)
+abstract class MixinClientWorld {
+
+    @Inject(method = "getSkyColor", at = @At("HEAD"), cancellable = true)
+    public void getSkyColor(Vec3d cameraPos, float tickDelta, CallbackInfoReturnable<Vec3d> info) {
+        WorldRenderDelegate.INSTANCE.getSkyColor(tickDelta).ifPresent(info::setReturnValue);
+    }
+}

src/main/resources/unicopia.mixin.json

@@ -57,6 +57,7 @@
     "client.MixinAnimalModel",
     "client.MixinArmorFeatureRenderer",
     "client.MixinCamera",
+    "client.MixinClientWorld",
     "client.MixinEntityRenderDispatcher",
     "client.MixinGameRenderer",
     "client.MixinHeldItemRenderer",