> Is it so that voxels can only occupy one tile?

> The result would be that any voxel that is a lot bigger then 1 tile is prone to graphical intersecting problems with units passing through each other...

> Is that correct?

> If true, can a voxel span several tiles?

I don't think you can set a bounding of more than one tile or you'd thing that WW would have done it for units like the dreadnaught and air craft carrier that do intersect with similarly large units.