see the following playground
http://www.babylonjs-playground.com/#2CPMRP#2
This has a ground , 2 boxes and a DirectionalLight
The two boxes cast shadow on ground.
If you move the two boxes away from each other the shadows cast by them start fading, becomes less sharp.
un-comment 13 and comment out 14 to see this effect
Is this expected behavior ?
(The above does not happen for useVarianceShadowMap)
Also is there any documentation on
shadowGenerator's properties
useVarianceShadowMap,
useBlurVarianceShadowMap,
usePoissonSampling,
bias