a few problems with uv baking in blender

Don

So i'm trying to bake my uv with ao but some problems arise.

I made a robot hat with bolts on it. to save polys, i just put the bolts inside the hat without any joining vertices.

like this:



but when i bake it the shadows look like this:



as you can see, the shadows look jagged and wavy.

also, some of the shadows dont match the bolt placements, and some areas of the shadows move when switching between object and edit mode.



i'm not so sure what i'm doing wrong. is there a way to have all shadows be consistent when parts of the model arent joined by vertices?

heres my .blend file for those who want it https://docs.google.com/open?id=0BzAddcjwZiphdllVUTdmUC1YNDA

Don

ok so i asked this question on reddit and someone helped me!

heres his post if others have problems similar to mine

http://www.reddit.com/r/blender/comments/15r1on/a_few_problems_with_uv_baking_a_tf2_item/c7p26s8

Nosslak

I did some quick tests and the only way I were able to reproduce your problem was by baking approximate AO. Is this what you did? If so try changing your AO Gather to raytrace. Approximate AO was implemented for Big Buck Bunny as all that fur with AO was taking way too long to render, so only use it if you're pressed for time. Raytraced AO is a lot more exact and generally produces better result.

Also the texture moves slightly when you switch between edit- and objectmode because I believe they use different triangulation. You might be able to combat this by using the new Triangulate modifier.

Good luck.

James Ordner

The texture moving when entering edit mode have to do with the triangulation of the mesh. If you triangulate the model before you bake (which I recommend you always do), you won't have this problem.