Hey all. I have been kicking around the idea of using a VTT to replace a tabletop for Traveller space battles. Having a virtually infinite plane to move about in is a huge benefit when an encounter takes place in outer space.

The addition of a computer to the game space, though, potentially opens other options, such as a z-plane. Are there any existing VTTs that account for movement in three dimensions?

I did once try to place models on telescoping bases, but you can only make them so tall, and they tended to topple too easily when fully extended.