Improve shadow results

[dpogue]

All shadows for a single light source should be combined into a single texture so that they do not stack onto each other.

[branan]

Combining them all into a single texture is one way to do this, but then the texture has to be mapped to a large enough area to see every shadow. That decreases shadow quality.

Another option (suggested by nadnerb) is to use the stencil buffer to merge the shadows in screen-space.

[dpogue]

err, right.

This ticket was meant to describe implementing Nadnerb's technique.

[Deledrius]

Another option (suggested by nadnerb) is to use the stencil buffer to merge the shadows in screen-space.

Is this something we can accomplish with the existing pipeline?