Initial tf for ugrid vr is bad
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
When you first turn on volume rendering for an unstructured grid, the transfer function is bad. It starts out with the opacity set to 1 everywhere (by default it should start with the low value set to opacity 0). Also, the transfer function widget does not display what the actual transfer function is initially. It starts with everything set to opacity 0 and the scalar values are wrong.
To see this bug in action, simply load dist_out_ref, view the Temp variable, and turn on volume rendering.