u,v barycentric coordinates vs. map coords


Hello OSL gurus,
Currently, there seems to be a mismatch between DCCs' interpretation of the u, v global variables. For example, Blender seems to output the current triangle barycentric coordinates vs. 3ds Max outputs the uvmap1 coordinates.
Are the u, v variables supposed to be barycentric coords or map coords?
If the answer is map coords, can we get barycentric globals? They are quite useful.

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