As some of you may know, I have been working on a small C voxel engine for a while. In order to create test assets I have been using the incredibly powerful MagicaVoxel voxel editor.
At this point I am about to start experimenting with voxel key frame animations. For this, I have written a small Houdini GEO node plugin to load MagicaVoxel .vox files as Houdini float 4 (rgba) volumes. It lets you load .vox files directly through the file SOP node.
The code for GEO .vox node is available in houdini-geo-vox repository.