 
 #ifdef DEBUG
           if (bOptimalResolution) {
-            debugFBO.r += 0.01;
+            debugFBO.r += 0.0025;
             debugFBO.w = 1;
           }
 #endif


#ifdef DEBUG
      if (bEmpty && bOptimalResolution) {
        debugFBO.g += 0.1;
        debugFBO.w = 1;
      }
#endif


          // early ray termination
          if (accRayColor.a > 0.99) {
#ifdef DEBUG            
            if (bOptimalResolution) {
              debugFBO.b = 1;
              debugFBO.w = 1;
            }
#endif            
            TerminateRay(bOptimalResolution);
            return;
          }
