message: path tracer volume sampler: use max opacity in interval value range for mu_max computation.
diff: @@ -43,8 +43,12 @@ float delta_tracking(
  {
  box1f subInterval = make_box1f(interval.tRange.lower, interval.tRange.upper);
  t = interval.tRange.lower;
  - const vec4f color_max = vModel->transferFunction->get(vModel->transferFunction, interval.valueRange.upper);
  - const float mu_max = vModel->densityScale * color_max.w;
  +
  + const float maxOpacity = vModel->transferFunction->getMaxOpacity(
  + vModel->transferFunction,
  + *((varying range1f * uniform) & interval.valueRange));
  +
  + const float mu_max = vModel->densityScale * maxOpacity;
  while (true)
  {
  