Render var

[madebygeoff]

Anyone know if there is a list of available render vars that Karma recognizes. The LPE tags are documented and I'm familiar with some of them from Renderman, but I haven't been able to find a full list of the utility passes and stat passes.

I'm guessing that whatever is listed in the Karma render settings node and the additional render vars node is the complete list, but I'd just like to be sure. These things:

ray:hitP
ray:hitN
ray:hitN_camera

And does anyone know if it is possible to author new render vars that Karma would recognize? I'm guessing not, but again, just want to be sure.

[RoseCliver]

On 8/9/2024 at 6:04 AM, madebygeoff said:

Anyone know if there is a list of available render vars that Karma recognizes. The LPE tags are documented and I'm familiar with some of them from Renderman, but I haven't been able to find a full list of the utility passes and stat passes.

I'm guessing that whatever is listed in the Karma render settings node and the additional render vars node is the complete list, but I'd just like to be sure. These things:

ray:hitP
ray:hitN
ray:hitN_camera

And does anyone know if it is possible to author new render vars that Karma would recognize? I'm guessing not, but again, just want to be sure. applebees

In Karma, available render variables (like ray:hitP, ray:hitN, and ray:hitN_camera) are generally those shown in the render settings and additional render vars nodes, though a comprehensive list isn’t directly documented. Custom render vars recognized by Karma are typically limited; however, you can create custom AOVs by using shaders or manipulating built-in attributes to output specific data. For updates or workarounds, checking SideFX resources or forums can be helpful.

Edited November 10 by RoseCliver

[jkunz07]

You can find some documented here:

https://www.sidefx.com/docs/houdini/nodes/lop/karmastandardrendervars.html

https://www.sidefx.com/docs/houdini/nodes/vop/kma_rayimport.html