Assuming a vertex ever 7.8 centimetres, we will need 128*128 = 16,384 vertices to cover each
of six 10 meter square quads contained in our cube. Altogether we must render 98,304 vertices
if all the faces are visible. And that is just one room! However the potential for real time
deformation now exists as a trivial and elegant image space technique, assuming that unique
displacement maps are used for each quad.
The sides of the cube will all overlap by 10cm - they will be placed at 9.9 metres from its center,
thus allowing the walls to be deformed with rock and blown away, even at the edges. So the inner
volume of the cube will be 9.8 cubic metres.