Use of DVR with other renderers: VAPOR GUI's volume rendering does not support more than one DVR being enabled at the same time. If you enable a second DVR in the same visualizer, other enabled DVR's will be disabled. There are also deficiencies in using other transparent volumes in the same volume. The DVR does not work correctly if an Isosurface, Probe, 2D, or Image renderer, using transparency, renders into the same region.
Bits per pixel: The DVR can use either 8 or 16-bits per voxel. Using 16 bits results in smoother images, with a moderate increase in memory space. There is a "Bits per voxel" selector near the bottom of the DVR tab.
Lighting: The volume rendering can often be improved by enabling lighting. This is enabled with a check box near the bottom of the DVR tab. When enabled, the volume rendering simulates the presence of one light source, based on the light settings in the View tab. Only the first light source is used.
Pre-integration, when checked, can sometimes improve the performance and appearance of the volume rendering.
