ao bake to vertices comes out inverted at the corners. #44178

New Issue

Aidy Burrows · 2015-03-29T18:21:56+02:00

Aidy Burrows commented

2015-03-29 18:21:56 +02:00

Windows 8.1

Blender Version
Broken: 2.73a and 2.74 release candidate 4.

ao bake to vertices comes out inverted at the corners.

Exact steps for others to reproduce the error
Take the standard cube, delete so only 3 adjacent faces remain. Invert the normals for the faces as though now looking at the corner of a room. Then subdivide the faces so there are enough faces to bake onto. Increase the gather samples so that the result will be smooth.

Set the bake mode to ambient occlusion, select 'bake to vertex color'.

This will be inverted at the corners when compared to dirty vertex color bakes.

Windows 8.1 **Blender Version** Broken: 2.73a and 2.74 release candidate 4. ao bake to vertices comes out inverted at the corners. **Exact steps for others to reproduce the error** Take the standard cube, delete so only 3 adjacent faces remain. Invert the normals for the faces as though now looking at the corner of a room. Then subdivide the faces so there are enough faces to bake onto. Increase the gather samples so that the result will be smooth. Set the bake mode to ambient occlusion, select 'bake to vertex color'. This will be inverted at the corners when compared to dirty vertex color bakes. ![aoissue.jpg](https://archive.blender.org/developer/F156127/aoissue.jpg) ![vertexAOBakeBug.jpg](https://archive.blender.org/developer/F156129/vertexAOBakeBug.jpg)

Aidy Burrows commented

2015-03-29 18:21:56 +02:00

Changed status to: 'Open'

Aidy Burrows commented

2015-03-29 18:21:56 +02:00

Added subscriber: @AidyBurrows-1

Sergey Sharybin commented

2015-03-31 13:02:57 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2015-03-31 13:02:57 +02:00

Sergey Sharybin self-assigned this 2015-03-31 13:02:57 +02:00

Sergey Sharybin commented

2015-03-31 13:02:57 +02:00

That's not total fair comparison of bake and dirty color because later one does perform blur on the values. Plus it's actually an approximation of AO based on curvature.

The reason you're having brighter edges is because it's quite tricky to record intersection for the ray casted from that location -- it might happily go to an environment from the outside part of the object. Baking selected to active with small bias might help in this cases, but real solution will is making the intersection code more robust for such cases.

Thanks for the report, but improvements are always possible and current vertex baking actually works as it was designed to. this goes to our TODO list: http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Render#Baking

That's not total fair comparison of bake and dirty color because later one does perform blur on the values. Plus it's actually an approximation of AO based on curvature. The reason you're having brighter edges is because it's quite tricky to record intersection for the ray casted from that location -- it might happily go to an environment from the outside part of the object. Baking selected to active with small bias might help in this cases, but real solution will is making the intersection code more robust for such cases. Thanks for the report, but improvements are always possible and current vertex baking actually works as it was designed to. this goes to our TODO list: http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Render#Baking

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ao bake to vertices comes out inverted at the corners. #44178