Not exactly like voxel map but kind of, since you have too much info to make individual voxels.
A mesh is a combination of a geometry and a material, so you can make a mesh out of any geometry suitable for texturizing (with uv coordinates assigned to vertices).
I was thinking about something like this:
but now when I made it… it looks pretty complex, so I’m not sure how useful it will be when you assign different textures to each plane.
You will also need a custom code to render half-transparent planes in a specific order.
Or maybe not to make them transparent and turn their visibility on and off, so you could look inside the cube.