[Bf-committers] Reviewing normal patch (finally)

[Ton Roosendaal]

Hi all,

There's like a dozen reports in the tracker about normals not  
rendering OK; this has been mostly caused by the patch from august  
2009. Although it gives much better results for procedurals, the  
changes in UV and Image sampling are inferior in many cases.

2.5x
http://www.blender.org/bf/new.png

2.49
http://www.blender.org/bf/old.png

- AA is bad (it doesn't check for pixel derivatives
- it doesn't scale (distance, or object size)

Check the bug tracker for even more horrible examples; renders you can  
find here:
http://www.blender.org/bf/new1.png
http://www.blender.org/bf/new2.png

One "good" thing then; this is with Full OSA material:
http://www.blender.org/bf/new-full-osa.png

However, render time of this picture (no raytrace) is 48 seconds...

Really needs to be solved! I've got difficulties understanding the  
patch though, it has a lot of uncommented calculus.

-Ton-

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Ton Roosendaal  Blender Foundation   ton at blender.org    www.blender.org
Blender Institute   Entrepotdok 57A  1018AD Amsterdam   The Netherlands