Config option for enabling/disabling vanilla fog (only applies when the voxy renderer is active)

src/main/java/me/cortex/voxy/client/config/VoxyConfig.java

@@ -28,6 +28,7 @@ public class VoxyConfig implements OptionStorage<VoxyConfig> {
     public int sectionRenderDistance = 16;
     public int serviceThreads = Math.max(Runtime.getRuntime().availableProcessors()/2, 1);
     public float subDivisionSize = 128;
+    public boolean renderVanillaFog = false;
 
     public static VoxyConfig loadOrCreate() {
         var path = getConfigPath();

src/main/java/me/cortex/voxy/client/config/VoxyConfigScreenPages.java

@@ -133,6 +133,7 @@ public class VoxyConfigScreenPages implements ModMenuApi {
                                 }
                             }
                         }, s -> s.enableRendering)
+                        .setImpact(OptionImpact.HIGH)
                         .build()
                 ).add(OptionImpl.createBuilder(int.class, storage)
                         .setName(Text.translatable("voxy.config.general.subDivisionSize"))
@@ -157,6 +158,12 @@ public class VoxyConfigScreenPages implements ModMenuApi {
                         }, s -> s.sectionRenderDistance)
                         .setImpact(OptionImpact.LOW)
                         .build()
+                ).add(OptionImpl.createBuilder(boolean.class, storage)
+                        .setName(Text.translatable("voxy.config.general.vanilla_fog"))
+                        .setTooltip(Text.translatable("voxy.config.general.vanilla_fog.tooltip"))
+                        .setControl(TickBoxControl::new)
+                        .setBinding((s, v)-> s.renderVanillaFog = v, s -> s.renderVanillaFog)
+                        .build()
                 ).build()
         );
         return new OptionPage(Text.translatable("voxy.config.title"), ImmutableList.copyOf(groups));

src/main/java/me/cortex/voxy/client/mixin/minecraft/MixinBackgroundRenderer.java

@@ -0,0 +1,27 @@
+package me.cortex.voxy.client.mixin.minecraft;
+
+import com.llamalad7.mixinextras.injector.wrapmethod.WrapMethod;
+import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
+import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
+import me.cortex.voxy.client.config.VoxyConfig;
+import me.cortex.voxy.client.core.IGetVoxyRenderSystem;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.BackgroundRenderer;
+import net.minecraft.client.render.Camera;
+import net.minecraft.client.render.Fog;
+import org.joml.Vector4f;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.Inject;
+
+@Mixin(BackgroundRenderer.class)
+public class MixinBackgroundRenderer {
+    @WrapMethod(method = "applyFog")
+    private static Fog voxy$overrideFog(Camera camera, BackgroundRenderer.FogType fogType, Vector4f color, float viewDistance, boolean thickenFog, float tickProgress, Operation<Fog> original) {
+        var vrs = (IGetVoxyRenderSystem)MinecraftClient.getInstance().worldRenderer;
+        if (VoxyConfig.CONFIG.renderVanillaFog || vrs == null || vrs.getVoxyRenderSystem() == null) {
+            return original.call(camera, fogType, color, viewDistance, thickenFog, tickProgress);
+        } else {
+            return Fog.DUMMY;
+        }
+    }
+}

src/main/resources/assets/voxy/lang/en_us.json

@@ -17,5 +17,8 @@
   "voxy.config.general.subDivisionSize.tooltip": "Maximum size in pixels (squared) of screenspace AABB before subdiving to smaller LoDs (Smaller being higher quality)",
 
   "voxy.config.general.renderDistance": "Render distance",
-  "voxy.config.general.renderDistance.tooltip": "Render distance of voxy in chunks"
+  "voxy.config.general.renderDistance.tooltip": "Render distance of voxy in chunks",
+
+  "voxy.config.general.vanilla_fog": "Enable vanilla fog",
+  "voxy.config.general.vanilla_fog.tooltip": "Enables or disables vanilla fog effect"
 }

src/main/resources/client.voxy.mixins.json

@@ -3,6 +3,7 @@
   "package": "me.cortex.voxy.client.mixin",
   "compatibilityLevel": "JAVA_17",
   "client": [
+    "minecraft.MixinBackgroundRenderer",
     "minecraft.MixinClientCommonNetworkHandler",
     "minecraft.MixinClientLoginNetworkHandler",
     "minecraft.MixinDebugHud",