Thanks Tor_R. Right now, the rasterization functionality hasn't been exposed in the Grasshopper plugin. We may add this in the future, but at the moment, you're best option would be to export a volume file (.vol) file from the Grasshopper plugin and then open it in the standalone application and do your rasterization editing there. You can export a vol file by right-clicking on any of the Monolith components (in Grasshopper) and choose "Save Voxel Data". I hope this helps.