Renderman FUR/HAIR

[noizFACTORY]

Looks like self shadowing artifacts to me.
Usually for renderman based renderers, you'd change the default shadow bias value in a maya light to something higher. Start with a shadow bias value of 0.2 and see if it gets rid of the problem. However, be careful not to increase it too much as shadows might get "detached" from the fur strands and look a little unnatural.

[corcoran3d]

Thanks,
I tired changing the Shadow bias and it didn't help. However I think I figured out what was wrong. I think the "Grass Fur" I was using might not be compatible with Renderman 1.0. Could be wrong but I remade the scene using a different fur and didn't get the black tips.
Thanks for you help!
Matt

[noizFACTORY]

Thanks,
I tired changing the Shadow bias and it didn't help. However I think I figured out what was wrong. I think the "Grass Fur" I was using might not be compatible with Renderman 1.0. Could be wrong but I remade the scene using a different fur and didn't get the black tips.
Thanks for you help!
Matt

I haven't used Renderman 1.0 thoroughly but from whatever I've learnt from others, it indeed was very buggy.

However, a fur preset shouldn't be the problem. After all, its just a collection of pre defined attribute settings. What is however possible that maybe there was some kind of noise applied to the tip color or some attribute of the fur description (in the details section) which wasn't being translated correctly by the renderer.

The new fur description you created probably got rid of those noise values. Anyway, glad that its working fine for you now!

-Sachin

[corcoran3d]

HA! You were right, it was the noise on the grass fur! Thanks for all you help Sachin. :cool:

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