More information: I think it has something to do with temporarily stored UV's or vertex order that gets changed when it exports and reimports back in?
I noticed that the normal map is m apping wrong and was distorting the reflection, which explains why the surface looks smooth in profile, but the ...

This is driving me up the wall...
I export and re-import a model into C4D without making any changes to it, apply the same material, same phong tag, same mesh no changes...but one of the meshes reflects properly, and the other doesn't. What is happening?
Here are the same mesh side by side. What is ...

I have a character in front of a house lit by an HDRI.
I want the house to self-shadow and cast shadows as normal.
However, I have a rim/hair/background light shining from behind the house to target the character.
The problem is the house blocks the rim light from hitting the character, and I want ...

I am having an issue where my mix material only displays correctly if I disconnect and reconnect the nodes, so it doesn’t update when I render the final straight to the picture viewer. I’ve looked all over the forums and some posts say to use an octane object tab and to check "force update", but I ...