Blender Git Loki

Eevee: Shadows: Transition to individual face rendering.

This gets rid of the need of a geom shader and instancing.

Both are pretty slow compared to the new method.
The only moment the old method could be better is when scene is filled
with lots of objects and most of the objects in the shadow map appear
on every layer.

But even then, we could optimize the culling and minimize the overhead.