As others pointed out Poser and Daz Studio dont interpret n-gons in the same way other modelling programs do. Turn off the check box for smoothing , and in your modelling program split your mesh into quads and triangles , especially where there are holes .

Poser also seems to hate long thin triangles , so you may have to manually split polys .

If you can see the underlying mesh on a surface (shown by lines on the texture) you may want to unweld those polys . Its that automatic smoothing again that is messing up .

Good luck with it .