Quote - Thanks Spanki,

I'm open minded on this.

I don't quite follow your statement that  "If you simply reverse the winding order of the existing vt references, they'll flip the texture around in various ways <>, but the artifact still appears." I am suggesting that any breaking of the vt winding order will cause artefacts, including reversing them, so yes I would expect reversing the winding order to create artefacts . I agree totally that reordering the vt references will flip the texture about.

Sorry, I chalk this up to applying different meanings to the term "winding order".  As typically used (in regards and related to vertex ordering), this refers to the order that the indices are listed in the facet record, but has less to do with the "index numbers" themselves and more to do with the 3D positional values of the vertices that those indices reference.

In other words, if the resulting vertex locations describe a polygon in a 'clockwise' direction (winding order, around the perimeter of the polygon), then the polygon is interpreted by apps as facing one direction, whereas if they describe a polygon in a "counter-clockwise' direction, then the polygon is facing the oppposite direction.

So, when a user chooses an option to "reverse the winding order" (in UVMapper or "Reverse Faces" in something like my plugin for Cinema 4D), the order of the vertex indices (whatever they happen to be) gets written out reversed, to flip the faces around - I assumed this is what you meant by the term.

I now see that you were more referring to the actual "index values" (regardless of the value of the UV it refers to) - which is even more interesting (wierd) as it relates to implications of causing the artifacts :).

I agree with Khai though... someone from SM needs to be looking into this and could probably provide a quick answer to all of our speculation about the potential causes and maybe a working solution (ie. work-around, for all the currently broken versions of Poser and a fix for any future patches or updates).

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