Adjust marking shaders for building

- Remove the hard-coded one for particles since the previous commit
  catches it.
- Only build fog shaders if there is a fog.

Author: slipher

src/engine/renderer/tr_init.cpp

@@ -1494,19 +1494,14 @@ ScreenshotCmd screenshotPNGRegistration("screenshotPNG", ssFormat_t::SSF_PNG, "p
 	{
 		R_SyncRenderThread();
 		if ( r_lazyShaders.Get() == 1 ) {
-			// Particles
-			gl_genericShader->SetVertexSkinning( false );
-			gl_genericShader->SetVertexAnimation( false );
-			gl_genericShader->SetTCGenEnvironment( false );
-			gl_genericShader->SetTCGenLightmap( false );
-			gl_genericShader->SetDepthFade( true );
-			gl_genericShader->MarkProgramForBuilding( 0 );
-
-			// Fog is applied dynamically based on the surface's BBox, so build all of the q3 fog shaders here
-			for ( uint32_t i = 0; i < 3; i++ ) {
-				gl_fogQuake3Shader->SetVertexSkinning( i & 1 );
-				gl_fogQuake3Shader->SetVertexAnimation( i & 2 );
-				gl_fogQuake3Shader->MarkProgramForBuilding( 0 );
+			if ( tr.world->numFogs > 0 )
+			{
+				// Fog is applied dynamically based on the surface's BBox, so build all of the q3 fog shaders here
+				for ( uint32_t i = 0; i < 3; i++ ) {
+					gl_fogQuake3Shader->SetVertexSkinning( i & 1 );
+					gl_fogQuake3Shader->SetVertexAnimation( i & 2 );
+					gl_fogQuake3Shader->MarkProgramForBuilding( 0 );
+				}
 			}
 
 			for ( int i = 0; i < tr.numModels; i++ ) {