re-add several necessary GLState calls

core/src/main/java/com/seibel/distanthorizons/core/render/glObject/GLState.java

@@ -97,7 +97,7 @@ public class GLState
 		this.texture2 = GL32.glGetInteger(GL32.GL_TEXTURE_BINDING_2D);
 		
 		GLMC.glActiveTexture(GL32.GL_TEXTURE3);
-		this.texture3= GL32.glGetInteger(GL32.GL_TEXTURE_BINDING_2D);
+		this.texture3 = GL32.glGetInteger(GL32.GL_TEXTURE_BINDING_2D);
 		
 		GLMC.glActiveTexture(this.activeTextureNumber);
 		

core/src/main/java/com/seibel/distanthorizons/core/render/renderer/FadeRenderer.java

@@ -117,9 +117,7 @@ public class FadeRenderer
 		profiler.push("DH-RenderLevel");
 		
 		
-		// TODO try removing this now that we use GLMC
-		// if there are reports of things breaking, we might have to re-add it
-		//GLState mcState = new GLState();
+		GLState mcState = new GLState();
 		
 		try
 		{
@@ -160,7 +158,8 @@ public class FadeRenderer
 		finally
 		{
 			// make sure we always revert to MC's state to prevent GL state corruption
-			//mcState.restore();
+			// this is especially important on MC 1.16.5 or when other rendering mods are present
+			mcState.restore();
 		}
 	}
 	

core/src/main/java/com/seibel/distanthorizons/core/render/renderer/FogRenderer.java

@@ -20,6 +20,7 @@
 package com.seibel.distanthorizons.core.render.renderer;
 
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
+import com.seibel.distanthorizons.core.render.glObject.GLState;
 import com.seibel.distanthorizons.core.render.renderer.shaders.FogApplyShader;
 import com.seibel.distanthorizons.core.render.renderer.shaders.FogShader;
 import com.seibel.distanthorizons.core.util.math.Mat4f;
@@ -101,6 +102,9 @@ public class FogRenderer
 	
 	public void render(Mat4f modelViewProjectionMatrix, float partialTicks)
 	{
+		// needed in MC 1.16.5 probably due to MC not manually setting each GL state they need before the next rendering step
+		GLState state = new GLState();
+		
 		this.init();
 		
 		// resize the framebuffer if necessary
@@ -119,6 +123,8 @@ public class FogRenderer
 		
 		FogApplyShader.INSTANCE.fogTexture = this.fogTexture;
 		FogApplyShader.INSTANCE.render(partialTicks);
+		
+		state.restore();
 	}
 	
 	public void free()

core/src/main/java/com/seibel/distanthorizons/core/render/renderer/SSAORenderer.java

@@ -102,8 +102,6 @@ public class SSAORenderer
 	
 	public void render(Mat4f projectionMatrix, float partialTicks)
 	{
-		// TODO remove need for GLState, there are a few GL items that aren't being cleaned up correctly
-		//  note that this doesn't affect Iris since Iris disables SSAO
 		GLState state = new GLState();
 		
 		this.init();

core/src/main/java/com/seibel/distanthorizons/core/render/renderer/shaders/DhApplyShader.java

@@ -20,6 +20,7 @@
 package com.seibel.distanthorizons.core.render.renderer.shaders;
 
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
+import com.seibel.distanthorizons.core.render.glObject.GLState;
 import com.seibel.distanthorizons.core.render.glObject.shader.ShaderProgram;
 import com.seibel.distanthorizons.core.render.renderer.LodRenderer;
 import com.seibel.distanthorizons.core.render.renderer.ScreenQuad;
@@ -82,6 +83,8 @@ public class DhApplyShader extends AbstractShaderRenderer
 		}
 		
 		
+		GLState state = new GLState();
+		
 		GLMC.disableDepthTest();
 		
 		GLMC.enableBlend();
@@ -100,6 +103,12 @@ public class DhApplyShader extends AbstractShaderRenderer
 		GLMC.glBindFramebuffer(GL32.GL_FRAMEBUFFER, targetFrameBuffer);
 		
 		ScreenQuad.INSTANCE.render();
+		
+		
+		// restore everything, except at this point the MC framebuffer should now be used instead
+		state.restore();
+		GLMC.glBindFramebuffer(GL32.GL_FRAMEBUFFER, targetFrameBuffer);
+		
 	}
 	
 }