Volume rendering multiblock
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
Volume rendering should be reasonable for multiblock data sets. At the very least a multiblock data containing a single volume render-able data set should just work.
Volume rendering of actual multiblock data would be nice, but probably not reasonble in general. For unstructured data, this would require an append of data, which may be more heavyweight than we want to support. If this is not supported directly, there should be an easy way to flatten a multiblock data set into a single data set.