if this issue happens on multiple maps and multiple meshes then it is not the mesh

 

therefor the issue is in your render settings or the program

So .. reset your render settings to default or use a downloaded one to see what happens. If that does not fix the issue,

then reinstall poser. It will not move or change any of your installed content but it will refresh Poser itself and all its bits. This will reset all preferences, so you will need to re-add any extra runtimes.

hope you get it sorted out

Lyrra