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Catmull-Clark subdivision surfaces are supported by 3Delight(16). Also, all the standard tags are recognized:
"hole"
"corner"
"crease"
"interpolateboundary"
Unlike other rendering packages, 3Delight does not attempt to tesselate the entire subdivision surface into many small polygons (thus taking a large amount of memory); instead, a lazy and adaptive process is used to generate only those portions of the surface that are needed for some specific bucket. Also, 3Delight generates smooth b-spline surfaces (instead of polygons) whenever possible.
All standard variable types are supported: constant
, uniform
, varying
, vertex
, facevarying
and facevertex
. facevertex
is used exactly as facevarying
but interpolates the variables according to surface's subdivision rules. This eliminates many distortion artifacts due to bilinear interpolation in facevarying
s.