While investigating alternative filters (Mitchell), I found two small errors in the Gauss code, it clipped wrong and multiplied wrong, causing settings other than filter size 1.0 to not work properly. Took the last-minute liberty to add more filter types in Blender too. Also wrote an extensive log about how sampling & filtering in Blender works. http://www.blender3d.org/cms/Samples_and_Filtering.723.0.html
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76 KiB