Quote - And that creates a different issue then; like how do vendors go about ensuring that when a user applies a material preset, the displacement will have the correct amplitude?

You've become misinformed. The displacement amount in the file is the same no matter what you're seeing on the screen. The display of that amount will depend on your chosen units, but that's a display unit, not a rendering unit. The rendering unit (what is in the file) is a constant, and it is inches.

Since people copy my shaders from screen shots, it is why I say in my signature:

My Poser Display Units are Inches.

If, however, I give you an actual mt5 material file, you don't need to know my display units and whatever I've set up will display on your screen in your units.

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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)