message: Call the right functions down the chain on our transfer fcn
diff: @@ -153,7 +153,7 @@ namespace ospray {
  (const osp::vec3i&)region_sz);
  }
  - transferFunction->render(ctx);
  + transferFunction->postCommit(ctx);
  ospSetObject(volume,"transferFunction",transferFunction->getOSPHandle());
  ospCommit(volume);
  @@ -349,6 +349,8 @@ namespace ospray {
  ospSetData(volume,"voxelData",data);
  }
  fclose(file);
  +
  + transferFunction->preCommit(ctx);
  }
  void StructuredVolumeFromFile::postCommit(RenderContext &ctx)
  