max 8 hair and vray 1.5

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

I’ve searched the forum to see if anyone has had problems rendering hair through vray but came up empty. I decided to throw the question out here to see if anyone has had this problem.

We have a model that will render fine without hair. And the hair will render if the rest of the model is hidden, but together we get an unhandled exception error.

We’ve tried stuff like switching to dynamic memory amoung other things but have yet to get it to render correctly.

There is a chance that our original geometry is corrupted but I’d like to know if anyone has run into any oddities with max 8 hair and Vray.

thanks,

V Miller

2

Sounds like you’re running out of memory.

Switching on dynamic geometry is a first step to reducing memory load. There’s been plenty of other examples on the forums on how to lighten up memory usage.

Also, switching to 64bit might help.

3

unfortunately 64 bit is not an option. switching to dynamic didn’t help. the more we work with it the more it seems like a geometry problem.

V Miller

4

When does it crash?
Is the hair set to geometry mode?

When you set the memory to dynamic did you change the dynamic memory level? you should increase that to about 1/2 - 3/4 of your available RAM

5

Do you have motion blur enabled?

Best regards,
Vlado

6

no motion blur. in fact the it doesn’t work even if the the hair count is really low, on the order of only 300 hairs.

V Miller

7

You can try to hide the original model and use an instance or copy of it for the actual rendering.

The issue might be (at least with motion blur it is) that the hair is evaluated last and throws away some of the data that is already collected and cached by V-Ray before that.

Best regards,
Vlado