today morning I modified standard pssm to psvsm (pcf smoothing is replaced with variance shadow mapping calculation). next thing is to blur the depthmaps.
@sivan: nice, but the screenshot looks like it uses no texture filtering. maybe the filtering in the sampler is set to point or none... or the range is wrong (should be [0...1] afaik)
yes, you are right it was not implemented, everything looked like little shadow squares. since the screenshot I added blur to depth views, now it is better, but I would need a better blurring... new pic with debug colouring:
