diff --git a/core/rend/gl4/gles.cpp b/core/rend/gl4/gles.cpp
index 51f12986c..8fb2e9e93 100644
--- a/core/rend/gl4/gles.cpp
+++ b/core/rend/gl4/gles.cpp
@@ -742,17 +742,6 @@ static bool RenderFrame(int width, int height)
 	gl4ShaderUniforms.fog_clamp_max[2] = ((pvrrc.fog_clamp_max >> 0) & 0xFF) / 255.0f;
 	gl4ShaderUniforms.fog_clamp_max[3] = ((pvrrc.fog_clamp_max >> 24) & 0xFF) / 255.0f;
 	
-	if (fog_needs_update && config::Fog)
-	{
-		fog_needs_update = false;
-		UpdateFogTexture((u8 *)FOG_TABLE, GL_TEXTURE5, GL_RED);
-	}
-	if (palette_updated)
-	{
-		UpdatePaletteTexture(GL_TEXTURE6);
-		palette_updated = false;
-	}
-
 	glcache.UseProgram(gl4.modvol_shader.program);
 
 	glUniformMatrix4fv(gl4.modvol_shader.normal_matrix, 1, GL_FALSE, &gl4ShaderUniforms.normal_mat[0][0]);
@@ -968,6 +957,13 @@ struct OpenGL4Renderer : OpenGLRenderer
 		return render_output_framebuffer();
 	}
 
+	GLenum getFogTextureSlot() const override {
+		return GL_TEXTURE5;
+	}
+	GLenum getPaletteTextureSlot() const override {
+		return GL_TEXTURE6;
+	}
+
 #ifdef LIBRETRO
 	void DrawOSD(bool clearScreen) override
 	{
diff --git a/core/rend/gles/gles.cpp b/core/rend/gles/gles.cpp
index 41dfb1b7b..caa157fc5 100644
--- a/core/rend/gles/gles.cpp
+++ b/core/rend/gles/gles.cpp
@@ -1076,7 +1076,7 @@ void OSD_DRAW(bool clear_screen)
 #endif
 }
 
-bool ProcessFrame(TA_context* ctx)
+bool OpenGLRenderer::Process(TA_context* ctx)
 {
 	if (KillTex)
 		TexCache.Clear();
@@ -1088,6 +1088,17 @@ bool ProcessFrame(TA_context* ctx)
 	}
 	else
 	{
+		if (fog_needs_update && config::Fog)
+		{
+			fog_needs_update = false;
+			UpdateFogTexture((u8 *)FOG_TABLE, getFogTextureSlot(), gl.single_channel_format);
+		}
+		if (palette_updated)
+		{
+			UpdatePaletteTexture(getPaletteTextureSlot());
+			palette_updated = false;
+		}
+
 		if (!ta_parse_vdrc(ctx))
 			return false;
 	}
@@ -1171,17 +1182,6 @@ bool RenderFrame(int width, int height)
 	ShaderUniforms.fog_clamp_max[2] = ((pvrrc.fog_clamp_max >> 0) & 0xFF) / 255.0f;
 	ShaderUniforms.fog_clamp_max[3] = ((pvrrc.fog_clamp_max >> 24) & 0xFF) / 255.0f;
 	
-	if (fog_needs_update && config::Fog)
-	{
-		fog_needs_update = false;
-		UpdateFogTexture((u8 *)FOG_TABLE, GL_TEXTURE1, gl.single_channel_format);
-	}
-	if (palette_updated)
-	{
-		UpdatePaletteTexture(GL_TEXTURE2);
-		palette_updated = false;
-	}
-
 	glcache.UseProgram(gl.modvol_shader.program);
 
 	if (gl.modvol_shader.depth_scale != -1)
diff --git a/core/rend/gles/gles.h b/core/rend/gles/gles.h
index 3deace7b3..0dc0ab924 100755
--- a/core/rend/gles/gles.h
+++ b/core/rend/gles/gles.h
@@ -269,7 +269,7 @@ struct OpenGLRenderer : Renderer
 	void Resize(int w, int h) override { width = w; height = h; }
 	void Term() override;
 
-	bool Process(TA_context* ctx) override { return ProcessFrame(ctx); }
+	bool Process(TA_context* ctx) override;
 
 	bool Render() override;
 
@@ -290,6 +290,13 @@ struct OpenGLRenderer : Renderer
 		return true;
 	}
 
+	virtual GLenum getFogTextureSlot() const {
+		return GL_TEXTURE1;
+	}
+	virtual GLenum getPaletteTextureSlot() const {
+		return GL_TEXTURE2;
+	}
+
 	bool frameRendered = false;
 	int width;
 	int height;