diff --git a/src/main/java/ru/bclib/client/render/CustomBackgroundRenderer.java b/src/main/java/ru/bclib/client/render/CustomBackgroundRenderer.java
new file mode 100644
index 00000000..f8b75a5a
--- /dev/null
+++ b/src/main/java/ru/bclib/client/render/CustomBackgroundRenderer.java
@@ -0,0 +1,111 @@
+package ru.bclib.client.render;
+
+import com.mojang.blaze3d.systems.RenderSystem;
+import net.minecraft.client.Camera;
+import net.minecraft.client.renderer.FogRenderer;
+import net.minecraft.core.BlockPos.MutableBlockPos;
+import net.minecraft.util.Mth;
+import net.minecraft.world.effect.MobEffectInstance;
+import net.minecraft.world.effect.MobEffects;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.biome.Biome;
+import net.minecraft.world.level.material.FogType;
+import ru.bclib.api.BiomeAPI;
+import ru.bclib.util.BackgroundInfo;
+import ru.bclib.util.MHelper;
+import ru.bclib.world.biomes.BCLBiome;
+
+public class CustomBackgroundRenderer {
+	private static final MutableBlockPos LAST_POS = new MutableBlockPos(0, -100, 0);
+	private static final MutableBlockPos MUT_POS = new MutableBlockPos();
+	private static final float[] FOG_DENSITY = new float[8];
+	private static final int GRID_SIZE = 32;
+	
+	public static boolean applyFogDensity(Camera camera, FogRenderer.FogMode fogMode, float viewDistance, boolean thickFog) {
+		Entity entity = camera.getEntity();
+		FogType fogType = camera.getFluidInCamera();
+		if (fogType != FogType.WATER) {
+			if (shouldIgnore(entity.level, (int) entity.getX(), (int) entity.getEyeY(), (int) entity.getZ())) {
+				return false;
+			}
+			float fog = getFogDensity(entity.level, entity.getX(), entity.getEyeY(), entity.getZ());
+			BackgroundInfo.fogDensity = fog;
+			float start = viewDistance * 0.75F / fog;
+			float end = viewDistance / fog;
+			
+			if (entity instanceof LivingEntity) {
+				LivingEntity livingEntity = (LivingEntity) entity;
+				MobEffectInstance effect = livingEntity.getEffect(MobEffects.BLINDNESS);
+				if (effect != null) {
+					int duration = effect.getDuration();
+					if (duration > 20) {
+						start = 0;
+						end *= 0.03F;
+						BackgroundInfo.blindness = 1;
+					}
+					else {
+						float delta = (float) duration / 20F;
+						BackgroundInfo.blindness = delta;
+						start = Mth.lerp(delta, start, 0);
+						end = Mth.lerp(delta, end, end * 0.03F);
+					}
+				}
+				else {
+					BackgroundInfo.blindness = 0;
+				}
+			}
+			
+			RenderSystem.setShaderFogStart(start);
+			RenderSystem.setShaderFogEnd(end);
+			return true;
+		}
+		return false;
+	}
+	
+	private static boolean shouldIgnore(Level level, int x, int y, int z) {
+		Biome biome = level.getBiome(MUT_POS.set(x, y, z));
+		return BiomeAPI.getRenderBiome(biome) == BiomeAPI.EMPTY_BIOME;
+	}
+	
+	private static float getFogDensityI(Level level, int x, int y, int z) {
+		Biome biome = level.getBiome(MUT_POS.set(x, y, z));
+		BCLBiome renderBiome = BiomeAPI.getRenderBiome(biome);
+		return renderBiome.getFogDensity();
+	}
+	
+	private static float getFogDensity(Level level, double x, double y, double z) {
+		int x1 = MHelper.floor(x / GRID_SIZE) * GRID_SIZE;
+		int y1 = MHelper.floor(y / GRID_SIZE) * GRID_SIZE;
+		int z1 = MHelper.floor(z / GRID_SIZE) * GRID_SIZE;
+		float dx = (float) (x - x1) / GRID_SIZE;
+		float dy = (float) (y - y1) / GRID_SIZE;
+		float dz = (float) (z - z1) / GRID_SIZE;
+		
+		if (LAST_POS.getX() != x1 || LAST_POS.getY() != y1 || LAST_POS.getZ() != z1) {
+			int x2 = x1 + GRID_SIZE;
+			int y2 = y1 + GRID_SIZE;
+			int z2 = z1 + GRID_SIZE;
+			LAST_POS.set(x1, y1, z1);
+			FOG_DENSITY[0] = getFogDensityI(level, x1, y1, z1);
+			FOG_DENSITY[1] = getFogDensityI(level, x2, y1, z1);
+			FOG_DENSITY[2] = getFogDensityI(level, x1, y2, z1);
+			FOG_DENSITY[3] = getFogDensityI(level, x2, y2, z1);
+			FOG_DENSITY[4] = getFogDensityI(level, x1, y1, z2);
+			FOG_DENSITY[5] = getFogDensityI(level, x2, y1, z2);
+			FOG_DENSITY[6] = getFogDensityI(level, x1, y2, z2);
+			FOG_DENSITY[7] = getFogDensityI(level, x2, y2, z2);
+		}
+		
+		float a = Mth.lerp(dx, FOG_DENSITY[0], FOG_DENSITY[1]);
+		float b = Mth.lerp(dx, FOG_DENSITY[2], FOG_DENSITY[3]);
+		float c = Mth.lerp(dx, FOG_DENSITY[4], FOG_DENSITY[5]);
+		float d = Mth.lerp(dx, FOG_DENSITY[6], FOG_DENSITY[7]);
+		
+		a = Mth.lerp(dy, a, b);
+		b = Mth.lerp(dy, c, d);
+		
+		return Mth.lerp(dz, a, b);
+	}
+}
diff --git a/src/main/java/ru/bclib/mixin/client/BackgroundRendererMixin.java b/src/main/java/ru/bclib/mixin/client/BackgroundRendererMixin.java
index 2fc492bd..f8576f4d 100644
--- a/src/main/java/ru/bclib/mixin/client/BackgroundRendererMixin.java
+++ b/src/main/java/ru/bclib/mixin/client/BackgroundRendererMixin.java
@@ -19,6 +19,7 @@ import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 import ru.bclib.api.BiomeAPI;
+import ru.bclib.client.render.CustomBackgroundRenderer;
 import ru.bclib.util.BackgroundInfo;
 import ru.bclib.util.MHelper;
 import ru.bclib.world.biomes.BCLBiome;
@@ -60,87 +61,8 @@ public class BackgroundRendererMixin {
 	
 	@Inject(method = "setupFog", at = @At("HEAD"), cancellable = true)
 	private static void bclib_fogDensity(Camera camera, FogRenderer.FogMode fogMode, float viewDistance, boolean thickFog, CallbackInfo info) {
-		Entity entity = camera.getEntity();
-		FogType fogType = camera.getFluidInCamera();
-		if (fogType != FogType.WATER) {
-			if (bclib_shouldIgnore(entity.level, (int) entity.getX(), (int) entity.getEyeY(), (int) entity.getZ())) {
-				return;
-			}
-			float fog = bclib_getFogDensity(entity.level, entity.getX(), entity.getEyeY(), entity.getZ());
-			BackgroundInfo.fogDensity = fog;
-			float start = viewDistance * 0.75F / fog;
-			float end = viewDistance / fog;
-			
-			if (entity instanceof LivingEntity) {
-				LivingEntity le = (LivingEntity) entity;
-				MobEffectInstance effect = le.getEffect(MobEffects.BLINDNESS);
-				if (effect != null) {
-					int duration = effect.getDuration();
-					if (duration > 20) {
-						start = 0;
-						end *= 0.03F;
-						BackgroundInfo.blindness = 1;
-					}
-					else {
-						float delta = (float) duration / 20F;
-						BackgroundInfo.blindness = delta;
-						start = Mth.lerp(delta, start, 0);
-						end = Mth.lerp(delta, end, end * 0.03F);
-					}
-				}
-				else {
-					BackgroundInfo.blindness = 0;
-				}
-			}
-			
-			RenderSystem.setShaderFogStart(start);
-			RenderSystem.setShaderFogEnd(end);
+		if (CustomBackgroundRenderer.applyFogDensity(camera, fogMode, viewDistance, thickFog)) {
 			info.cancel();
 		}
 	}
-	
-	private static boolean bclib_shouldIgnore(Level level, int x, int y, int z) {
-		Biome biome = level.getBiome(BCLIB_MUT_POS.set(x, y, z));
-		return BiomeAPI.getRenderBiome(biome) == BiomeAPI.EMPTY_BIOME;
-	}
-	
-	private static float bclib_getFogDensityI(Level level, int x, int y, int z) {
-		Biome biome = level.getBiome(BCLIB_MUT_POS.set(x, y, z));
-		BCLBiome renderBiome = BiomeAPI.getRenderBiome(biome);
-		return renderBiome.getFogDensity();
-	}
-	
-	private static float bclib_getFogDensity(Level level, double x, double y, double z) {
-		int x1 = (MHelper.floor(x) >> 3) << 3;
-		int y1 = (MHelper.floor(y) >> 3) << 3;
-		int z1 = (MHelper.floor(z) >> 3) << 3;
-		float dx = (float) (x - x1) / 8F;
-		float dy = (float) (y - y1) / 8F;
-		float dz = (float) (z - z1) / 8F;
-		
-		if (BCLIB_LAST_POS.getX() != x1 || BCLIB_LAST_POS.getY() != y1 || BCLIB_LAST_POS.getZ() != z1) {
-			int x2 = x1 + 8;
-			int y2 = y1 + 8;
-			int z2 = z1 + 8;
-			BCLIB_LAST_POS.set(x1, y1, z1);
-			BCLIB_FOG_DENSITY[0] = bclib_getFogDensityI(level, x1, y1, z1);
-			BCLIB_FOG_DENSITY[1] = bclib_getFogDensityI(level, x2, y1, z1);
-			BCLIB_FOG_DENSITY[2] = bclib_getFogDensityI(level, x1, y2, z1);
-			BCLIB_FOG_DENSITY[3] = bclib_getFogDensityI(level, x2, y2, z1);
-			BCLIB_FOG_DENSITY[4] = bclib_getFogDensityI(level, x1, y1, z2);
-			BCLIB_FOG_DENSITY[5] = bclib_getFogDensityI(level, x2, y1, z2);
-			BCLIB_FOG_DENSITY[6] = bclib_getFogDensityI(level, x1, y2, z2);
-			BCLIB_FOG_DENSITY[7] = bclib_getFogDensityI(level, x2, y2, z2);
-		}
-		
-		float a = Mth.lerp(dx, BCLIB_FOG_DENSITY[0], BCLIB_FOG_DENSITY[1]);
-		float b = Mth.lerp(dx, BCLIB_FOG_DENSITY[2], BCLIB_FOG_DENSITY[3]);
-		float c = Mth.lerp(dx, BCLIB_FOG_DENSITY[4], BCLIB_FOG_DENSITY[5]);
-		float d = Mth.lerp(dx, BCLIB_FOG_DENSITY[6], BCLIB_FOG_DENSITY[7]);
-		
-		a = Mth.lerp(dy, a, b);
-		b = Mth.lerp(dy, c, d);
-		
-		return Mth.lerp(dz, a, b);
-	}
 }