Internal: Weird UV deformations during animation

Support Materials and Textures
1

Hi everyone,

I don’t really frequent the forums, because Blender has such a large archive of already solved issues that I usually get along fine.

However, I now have an issue that has completely stumped me and I cannot figure out what it is. I made a very (!) low poly character to test out some things and I have some very weird UV jumping issues in the internal render. The issues do not show up in OpenGL.

[video]https://youtu.be/rftgjJ90dxA[/video]

[video]https://youtu.be/H4XvgKqUJtk[/video]

Anybody have an idea what is going on here?

2

It looks like bad skinning, likely related to the lowpoly nature of the character. You might want to create a bug report. Strangely though, the second animation looks fine.

3

Yes, the second animation is from the viewport, where no issues occur. Perhaps I should try what the UV does in Cycles. If noone else has any ideas I will file a bug report. :slight_smile:

4

I think the renderer might be re-triangulating those quads every frame. Try triangulating them manually, and see if the problem persists.

5

Thank you!!! That was the solution. This is very helpful, now I feel much less worried about trying out more projects like this.