User functions have come back, and what seemed to me at the time an excuse to implement a structure that’s both ambitious (because it wishes to liken itself to Houdini) and hacky (because it ain’t Houdini), seems now to have been vindicated.

Talking about user functions is like talking about… well, nothing analogous I can pick out: no one relates to it, not because it isn’t uncommon — cg ops use it all the time in other progs — but because it’s in Janus, and thus LW, and among the LW crowd, it’s weird.

But then I contact this person asking for some scripting help; he’s made his assets and scenes, and needs a way to break out passes; I learn about what he particularly wants, and think Janus fits the bill, albeit requires a bit of modification to get the exact workflow. I ponder how much modification is needed. Then I realise that I already have a system of user customisation in Janus: user functions. But user functions, prior to this new development, was only in the realm of the more broad render pass settings (eg subcommands, and the cmd line). What was needed was to expand the same functionality to partial surface overrides, which were contained in text files.

This modification — user functions implemented in partial surface overrides — was done in one night, because there wasn’t much fudging of code; the functions were all there, and all I needed to do was apply the right timings so that the parsing functions didn’t fall on top of one another, and that the proper variables were being populated first before passing it on to the user function. So now, using the very system I made for Janus users, I’m using that system to get unique results instead of hard-coding things in.

I’m very grateful, and again, feel vindicated, that by not taking the easy route, by sticking to the vision I had for Janus, I am seeing the result of the flexibility, which I had hoped would be more evident to LW users. While I still inwardly bemoan the fact that Janus is not a very popular tool, it’s hard to feel sorry for it when its proving itself up to task in more and more situations.