Invalid geometric normal

[kosso_olli]

Can you try to convert the parts to editable poly? I had some problems in the past, where assigning the VrayDisplaceMod caused flipped normals, sometimes even in the viewport. Those parts were imported geometry from CAD as well.

[glorybound]

Yes, everything is an editable poly.

[fixeighted]

So obviously that geo is not liked, for whatever specific reason.
Subdividing then heavily optimising the mesh will fix it, so that's one quick solution.
I'd go with that

[glorybound]

I tried subdividing, but that breaks something too.

[fixeighted]

Oh ok...it's hard to know exactly with that scene part, as all the textures are missing, so I tested with a basic shader plus random displacement map and it seemed to be fine.
What breaks?

[glorybound]

Support came back and said it was terrible geometry on the walls. This makes sense because three of the houses I did were SU imports. However, today, I have one that I modeled from scratch and am getting the same error. The problem is, when I get this error, my render slave will not contribute to the render.

[glorybound]

New project same error. I am not doing anything different than I have for decades, so something on the software side has had to have changed.

[08:27:03.766] Warning : Invalid geometric normal (0 0 0) for "Non-converted Unicode render instance name".

[hermit.crab]

Is it an imported CAD model again?

[glorybound]

No, this one I modeled in MAX.

[hermit.crab]

Do send it so we can troubleshoot. Maybe there's a common link between them.