hi Paul , All,
I have noticed sometimes I have artefacts on Bump map. See render below:
You can see (depending on camera angle) that there are some shading/lighting artefacts (edges marked with green).
If we compare to the Polysurface, you can see that artefacts appear directly along surface edges:
BTW, surface was created with TSplines for Rhino5. Is this the core of the problem, maybe??
So, why those artefacts appear?? Is it related in any way to "Shadow terminator" issue ?? or something else??
Attaching Rhino6 file:
Thanks,
Igor