> Might we implement a normals pattern which allows users to lean/bend
normals toward a light source as a new normal block pattern?
Sure (?) - would grabbing the light source position and applying the shear_trans
with the normalized inverse position, and using a normal {function {}} (like I
_just_ did for Mike H's fake shadow) not do it?
Add that (normalized) vector to whatever existing normal(s) and then
renormalize?
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