Posers render "PREVIEW" settings only scales the map for preview. NOT for the final render. The slider says it: "Preview texture resolution".

The map used for rendering is the map resolution you import in the material room.

So to answer your question: changing this slider has an impact on the preview quality, but has NO influence on the final render outcome.

Render time, memory usage, render quality will all stay the same for the final render.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
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