Interpolating depth values

[LuudJanssen]

The depth is currently defined in fixed values (2, 3, 4, 6, 8, 16, 24). However the specs dictate that interpolation should be possible for sub-menu's. Meaning a depth of any natural number should be possible.

I get that it might be difficult to generate functions that interpolate the shadow properties, however, I think it should be possible.