fix normal discontinuity in SDF conePills #779
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Cone pills implement a smooth profile (sigmoid-like). Unfortunately, this creates discontinuities in the normals as shown on this render:
This pull request fixes this:
As explained in this article we could use either the
smooth()function, or thesmoother()function, which have slightly different stepness.Here using smooth:
I am not certain what is the better solution in this case.