Here's another snapshot of the exporter GUI so far. Note that this exploded layout showing all the panels at once is not how it will be implemented. They'll be folded into a tab navigator or an accordion. I still haven't decided which I like better - maybe I'll let the user choose. I just arranged it this way so I could snapshot all of it in one image.

I think this is a workable starting set of properties for the film, render setttings, and camera. (There are a ton more in these areas.)

Now I'll integrate the GUI into the exporter framework and code the exporter to use the user supplied values from this GUI to construct the Lux scene file.

I really love this GUI engine - adding new properties is sooooo easy and requires zero coding.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)