Index: ps/trunk/source/gui/GUIRenderer.cpp
===================================================================
--- ps/trunk/source/gui/GUIRenderer.cpp
+++ ps/trunk/source/gui/GUIRenderer.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2019 Wildfire Games.
+/* Copyright (C) 2020 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -341,11 +341,10 @@
 
 	glDisable(GL_BLEND);
 
-	// Set LOD bias so mipmapped textures are prettier
-#if CONFIG2_GLES
-#warning TODO: implement GUI LOD bias for GLES
-#else
-	glTexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, -1.f);
+#if !CONFIG2_GLES
+	// Set LOD bias so mipmapped textures are prettier in FFP mode.
+	if (g_RenderingOptions.GetRenderPath() == RenderPath::FIXED)
+		glTexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, -1.f);
 #endif
 
 	// Iterate through each DrawCall, and execute whatever drawing code is being called
@@ -447,9 +446,8 @@
 		glDisable(GL_BLEND);
 	}
 
-#if CONFIG2_GLES
-#warning TODO: implement GUI LOD bias for GLES
-#else
-	glTexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, 0.f);
+#if !CONFIG2_GLES
+	if (g_RenderingOptions.GetRenderPath() == RenderPath::FIXED)
+		glTexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, 0.f);
 #endif
 }
Index: ps/trunk/source/renderer/Renderer.cpp
===================================================================
--- ps/trunk/source/renderer/Renderer.cpp
+++ ps/trunk/source/renderer/Renderer.cpp
@@ -1414,7 +1414,8 @@
 #if !CONFIG2_GLES
 	// Clean up texture blend mode so particles and other things render OK
 	// (really this should be cleaned up by whoever set it)
-	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+	if (g_RenderingOptions.GetRenderPath() == RenderPath::FIXED)
+		glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 #endif
 
 	// render debug lines
Index: ps/trunk/source/renderer/SkyManager.cpp
===================================================================
--- ps/trunk/source/renderer/SkyManager.cpp
+++ ps/trunk/source/renderer/SkyManager.cpp
@@ -207,7 +207,8 @@
 	glDepthMask(GL_FALSE);
 
 	pglActiveTextureARB(GL_TEXTURE0_ARB);
-	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+	if (g_RenderingOptions.GetRenderPath() == RenderPath::FIXED)
+		glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 
 	glMatrixMode(GL_MODELVIEW);
 	glPushMatrix();
@@ -293,6 +294,9 @@
 
 	glPopMatrix();
 
+	if (g_RenderingOptions.GetRenderPath() == RenderPath::FIXED)
+		glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
 	glDepthMask(GL_TRUE);
 
 #endif