Port over changes from legacy MultiVolumeVisual to latest MultiVolumeVisual class
Port over changes from legacy MultiVolumeVisual to latest MultiVolumeVisual class
astrofrog/glue-3d-viewer,astrofrog/glue-vispy-viewers,glue-viz/glue-vispy-viewers,PennyQ/glue-3d-viewer,PennyQ/astro-vispy,glue-viz/glue-3d-viewer