Strange shadowmaps

[wurp]

How come the shadowmaps sometimes get a sharp edge when rendering, is thre some way I can fix this problem?
Here is an example of what i mean:

[atyss]

Bonjour wurp,

This is a common problem found in mental ray. I would call this a limitation. It is the same as in SI3D. There is not much you can do about it, but this:

• Reduce the Softness of your Shadow Map. mental ray has a real hard time dealing with large Softness values, producing this kind of results on certain areas.

• Use several lights with reduced Softness value to increase the shadow area instead of one source with a big Softness. I you put these lights close to each other, you will even be able to simulate an area light. I suggest you use the BankOfPointLights script you can find here:

http://www.aldis.org.uk/3DResources/Scripts.htm

Hope this helps
Salutations - Cheers
Bernard Lebel