Area lights can only have one shadow casting at any time

[diegzumillo]

I know this will probably never be developed, since there are newer alternatives in HDRP and others. But I like this one! I like its simplicity over that complicated mess meant to fit every possible case that is the HDRP implementation.

So before I dive into that intinidating computeshader code, was this feature ever in place or did something break along the way? That should inform me whether the fix will be easy or not.