@MissB - how about loading the texture template onto the model in Poser as a diffuse colour map via the Material Room? Duplicate the template first, name it appropriately (MyMap for example) and save it as a jpg or png, set up a very simple shader in Poser and load it, then also load the template in your image editor. Create a new layer to paint on, then when you save it out replace MyMap. In Poser use Reload Textures in the menu to update to the new version of MyMap. Not as quick or accurate as a 3d paint app, but might help a bit?

You can also try colouring the seam edges of the template in different colours to see where they fall on the model in Poser, or flood fill the different UV islands on the template in different colours.

PS. +1 for UV Layout from me too, it cost a lot for Pro but I have never regretted that purchase!

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