Heya!
We've just stumbled across a problem with Tangent Based Normal Maps and
Hard Edges; since a Tangent Based Normal Map is relative to
a) the Tangent Space and
b) the object's Geometry Normals,
obviously the Smoothing value in the Tangent Operator as well as the
Angle value of the Geometry Approximation property have to match each
other to create a correct piece of Normal Mapping in the end.
Now, if we decide to create Hard Edges on the mesh, there seems to be no
way to feed this piece of information into the Tangent Map, since the
operator does not evaluate the true Geometry Normals, but seems to
create an own set on the fly.
So, questions are:
a) Did we get this correctly?
b) In case yes, is there any solution to this problem except of not
using Hard Edges (or writing an own Tangent operator)?
Cheers for a quick piece of enlightenment!
-André
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