We have poser.PrefsLocation, poser.TempLocation, and a few more.

i was not able to find a simple definition of the RendersLocation and, while we're at it, the present selected 'front' render.

Background: Did make way to export the current selected render to Krita or PaintshopPro. Now calling Krita from Poser to get the .exr's into postwork. It works now with hard coded path to the cache and simply latest .exr bu would be nice to send the curent selected render.
Would be fun to have it