message: Kind of a wacky test for multiple boxes, but it works :)
diff: @@ -282,6 +282,20 @@ namespace ospRandSciVisTest {
  box3f worldBounds(vec3f(0), vec3f(1));
  std::vector<box3f> clipBoxes{volume.second};
  + bool setGap = false;
  + if (mpicommon::numGlobalRanks() % 2 == 0) {
  + setGap = mpicommon::globalRank() % 3 == 0;
  + } else {
  + setGap = mpicommon::globalRank() % 2 == 0;
  + }
  + if (setGap) {
  + const float step = (clipBoxes[0].upper.x - clipBoxes[0].lower.x) / 4.0;
  + const vec3f low = clipBoxes[0].lower;
  + const vec3f hi = clipBoxes[0].upper;
  + clipBoxes[0].upper.x = low.x + step;
  + clipBoxes.push_back(box3f(vec3f(low.x + step * 3, low.y, low.z),
  + vec3f(low.x + step * 4, hi.y, hi.z)));
  + }
  ospray::cpp::Data clipBoxData(clipBoxes.size() * 2, OSP_FLOAT3,
  clipBoxes.data());
  model.set("clipBoxes", clipBoxData);
  