every time you render poser looks at the texture again. So even if the texture preview doesn't show your latest edits the render will. So go ahead and edit the image you have applied, save and render in poser to see if you got it. Note: PSP 6 and above take PSD files, admittedly without all the bells and whistles of Pshop, but hey, at least you can open them with layers intact. Also check out Snowsultan's excellent seam guides, he usually marks problem areas