shadow issue

[satguru]

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

 

[GameMonetize]

yep it is (sort of). Babylon.js tries to capture the shadow maps from a point of view where it can embrace both boxes.

You can turn this behavior off with light.autoUpdateExtends = false;

 

Regarding shadows documentation: http://doc.babylonjs.com/tutorials/Shadows

[satguru]

tried "light.autoUpdateExtends = false;".

doesn't seem to work

http://www.babylonjs-playground.com/#2CPMRP#3

Thanks for the docs. Not sure how I missed those

 

 

[GameMonetize]

actually it works as it does not update the extend anymore (if the box moves for instance)

you can then control the scale of the viewport with shadowOrthoScale:

http://www.babylonjs-playground.com/#2CPMRP#4

[satguru]

ahh!

I see what you mean.

So if I set the position of the meshes , set  autoUpdateExtends  to false and then change the  position of one of  the mesh then the shadow of the other meshes do not change.

Of course the mesh which is moved no longer shows any shadow.

can be seen here

http://www.babylonjs-playground.com/#2CPMRP#6

clicking the canvas toggles the position of one of the box.

un-commenting line  36 shows the effect of autoUpdateExtends 

shadowOrthoScale  also helps

Nice, Thanks