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These two parameters select the shape and the size of the screen filter. The available filter types are : gaussian, mitchell, catmull-rom, sinc, box and triangle.
We recommend to use a gaussian pixel filter with a filter width of 2 as this will produce optimal quality.
The mitchell, catmull-rom and sinc filter are legacy filters that were suitable in scanline renderers (such as REYES algorithms) in which sharpening was used to artificially compensate for the blur introduced by the lack of shading samples per pixel. In a path-tracer, every camera ray contributes to shading and renders are crisp by default. Using these sharp filters in a context of a path-tracer is thus counter productive. Note that these filters need to have filter widths larger than 4 in order to work as designed.
The box and triangle filtler are provided for completeness.We recommend to use a gaussian pixel filter with a filter width of 2 as this will produce optimal quality.
Motion Blur
Enables motion blur for the entire scene. By default, 3Delight will use a 2 step motion blur.
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