- Less draw calls
- Much faster rendering updates (about 5x),
although colliders are still the biggest bottleneck so when collision is
enabled this improvement isn't noticeable
- A shader is now always required to render Transvoxel properly.
TODO: integrate a default one when no material is assigned?
This effectively creates them after ALL main meshes have been built,
resulting in a seemingly faster convergence of LOD, however when moving
around it causes some cracks to appear briefly. This can be bad if the
terrain is dark and the underlying skybox is bright. Might need to be
optional, or find a different approach.
