The problem is created when common vertices are used for adjacent sides that create a sharp corner.

When common vertices are used, Poser tries to "bend" the light (i.e., texture) around the corner.

When the vertices are "split" then Poser will display the faces with a sharp edge.

cheers,
dr geep
;=]

Remember ... "With Poser, all things are possible, and poseable!"

cheers,

dr geep ... :o]

edited 10/5/2019