     sampleColor += currentColor;
   }  // per active object loop
 
-  // clamp cumulatie sample value
   return clampColor(sampleColor);
 }
 

    if (fragmentColor.w > 0.999)
      break;

    // prepare next segment
    startPos_eye += step_eye;
  }  // sampling steps


  int volumeId;
  mat4 objectToDatasetMatrix;
  int transferFunctionRow;
};

layout(std430, binding = 1) buffer CB1
