private void Log(int frame, int s, int t) {
   Date end = new Date();
   long milliseconds = end.getTime() - _renderStartTime.getTime();

   DecimalFormat integerFormatter = new DecimalFormat("###,###,###,###");

   String duration = getDurationString(_renderStartTime, end);
   if (s >= 0 || t >= 0) {
      Logger.Log("Finished rendering lightpath length [s] = " + s 
         + ", eyepath length [t] = " + t + " in " + duration);
   }
   else {
      Logger.Log("Finished rendering frame " + frame + " in " + duration);
   }
   int pixels = _qualityPreset.getX() * _qualityPreset.getY();
   Logger.Log(integerFormatter.format(pixels) +  " pixels, " 
      + integerFormatter.format(InitialRays) +  " initial rays");

   long fillRate = (long)(pixels * 1000 / (float)milliseconds);
   Logger.Log(integerFormatter.format(fillRate) + " pixels / sec fillrate");
}