If not using simple assets, we need to make clear each model
is not just one mesh, but may include several. Also, having more than
one material slot will result in more than one draw call per mesh.
In addition to model stats added reporting of increased draw call count
based on enabling shadows, skybox, or ambient occlusion.

- antialiasing
- effects
- ibl, ao, skybox
- shadows with different lights
- render modes

Note: Not final version yet, needs some work.