Accumulate multiple shadow samples properly.
Accumulate multiple shadow samples properly.

sereepap2029/playcanvas,sereepap2029/playcanvas,guycalledfrank/engine,3DGEOM/engine,3DGEOM/engine,sanyaade-teachings/engine,sanyaade-teachings/engine,nizihabi/engine,sanyaade-teachings/engine,horryq/engine-1,guycalledfrank/engine,maxwellalive/engine,playcanvas/engine,shinate/engine,SuperStarPL/engine,shinate/engine,MicroWorldwide/PlayCanvas,3DGEOM/engine,MicroWorldwide/PlayCanvas,playcanvas/engine,sereepap2029/playcanvas,horryq/engine-1,SuperStarPL/engine,RainsSoft/engine,H1Gdev/engine,nizihabi/engine,maxwellalive/engine,aidinabedi/playcanvas-engine,maxwellalive/engine,H1Gdev/engine,nizihabi/engine,RainsSoft/engine,aidinabedi/playcanvas-engine,shinate/engine,RainsSoft/engine,SuperStarPL/engine,horryq/engine-1