Well, I tried to go free. Here's a new working GIMP script that simply imports a folder of PNG renders and puts each one onto a new layer. Why such a basic and useful import script does not ship with GIMP, and is seemingly unknown to the forums, is beyond me. It took about five hours to find this, and even then it needed to be tweaked and hacked.

As for having a PoserPython script then call GIMP + this Python script as a subprocess.... that is a total nightmare to set up and nowhere near as simple as 'c:/gimp.exe calls c:/batch.py'. It appears to involve having GIMP 'know' where the called script is, and be able to start its other modules in subprocess mode. I just cannot get that even remotely working. So much so that I just have to go back to calling Photoshop + script, which is vastly easier to call.

---

Learn the Secrets of Poser 11 and Line-art Filters.