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Octane 2026.3.3 Alpha 3MaterialX Bug (21.0.512)

Posted: Thu Dec 04, 2025 3:28 pm
by NOC2
Hi;

I'm getting this weird glitch when I try to render a simple sphere with material X applied to it.

Re: Octane 2026 Alpha MaterialX Bug (21.0.512)

Posted: Thu Dec 04, 2025 8:07 pm
by NOC2
I didn't share a debug file and/or a hip file, because this seems to be quite persistent and should be easy to replicate.

1- In Houdini v 21.0.512 In the obj context, create a mesh.
2- Create a Mat net and an Octane Vop and inside it. Dive inside and create a materialx standard shader and connect to an Octane Material Out node.
3- Assign the material to the mesh.
4- Get an IPR render.

Re: Octane 2026.3.3 Alpha 3MaterialX Bug (21.0.512)

Posted: Sun Dec 07, 2025 1:29 am
by NOC2
Has this bug been looked into and reproduced?

Re: Octane 2026.3.3 Alpha 3MaterialX Bug (21.0.512)

Posted: Thu Dec 11, 2025 3:23 am
by jan8
I can reproduce it

Re: Octane 2026.3.3 Alpha 3MaterialX Bug (21.0.512)

Posted: Thu Dec 11, 2025 2:05 pm
by dom_otoy
Yeah the issue is that the default in mtlx node for normal value is 0,0,0 but Normals usually should default to 0.5,0.5,1. So the numerical value here should be ignored.
This should be fixed in the next release, but in the meantime plugging in a normal node should fix the problem.