vRay IES lights - shadow problem

V-Ray V-Ray for 3ds Max V-Ray for 3ds Max :: Issues
1

Hello,

I’m facing a weird and serious problem here, on a tight deadline ! please check the enclosed rendering … apparently, vRay IES lights shadows produce some banding / hard edges shadows ! have you guys ever got this problem ? is there a way to solve that, please ?

Thanks a lot for any help !

Regards.

2

Have you tried other IES light files ??? The one you have may be currupt/faulty.
There seems to be a lot of variation in how IES files are written but I have never seen issues like this before.

3

Hello,

Thanks for your suggestion. I’ve tested the same IES file, but in a simple scene (only light / cylinder / plane), and I don’t get the problem … must be something in the scene :frowning: but I haven’t found yet.

Thanks again.

4

You can try to set cutoff to 0 instead of 0,001

5

Thks Nils, I’ll try that too :slight_smile: but won’t that have a negative impact on rendertime ?

6

I think it does. Vlado probably has the right answer for this.

7

Ok :slight_smile:

But once again, it’s really weird: when I try this exact same IES light in a simple scene, with plane and cylinder - it’s perfect. Only in “full” scenes with many lights, I get this behavior :frowning:

Thanks again for your suggestion :wink:

Regards.