Hi all,

Is there a quick and easy way to get an ambient occlusion pass for a groom? I see there’s the Labs "physical_ambient_occlusion" node, but it just turns my groom black, while my mesh (at the same scale) gets a nice occlusion pass. I suspect occlusion on groom curves isn’t supported yet, or maybe I need to set one of the parameters differently? Do you know if there’s a workaround?

Ultimately, I’d like to add the occlusion pass into a vector attribute (for RGB packing).

Thanks!

EDIT: I was able to get some AO on my groom by setting "Ray Offset" to .1 with the Labs physical_ambient_occlusion node. Must be something with how the occlusion is calculated on high detailed objects? Per SideFx doc.

I'm guessing the labs ambient occlusion requires some raytrace operations to detect polygon hits. Curves are infinitely thin so, raytrace operations wont work properly.

I don't know any alternative for curves, sorry.

-Olivier