Allow Opacity Settings for All
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
The opacity of the control points in the colormap editor cannot be set interactively or in a file. I have been told this is enabled only for volume rendering. It should be enabled in all cases.
For example, using a modification of ParaView 2.6.1, we used custom colormaps to color data on a plane so that a second plane could show through where the scalars were small. The second plane was a full-color USGS elevation relief map. The result was very effective and I see no good way to do this without the requested feature.