All works fine when i take an Half-Half circle but fails when i take an Half circle!
(points are added to the surface BEFORE use of the Blend Function!
The object on the background if an half circle in the two cases!


here with a simple arc Half Arc circle! That fails!
Seems the surface is divided by Half for any reason! :)



If you choose points on the left surface will be divided! :(
https://moiscript.weebly.com/uploads/3/9/3/8/3938813/the_2cases.3dm