Blender Git Loki

Eevee: Implement jittered soft shadowmap

This new option is located in the shadows options in the render settings.
This approach is simple and just randomize the shadow map position (not
the lamp itself) and just let the temporal supersampling do the average of
all the shadowing. The downside is that is needs quite a large number of
samples to give smooth results and individual sample position can remain
visible.

Enabling this option will make the viewport refresh all shadow maps every
redraw so it has a serious performance impact.

This approach is not physicaly based at all and will not match cycles.

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The sampling for point lamps (spheres) is not