LaurieA opened this issue on Aug 27, 2010 · 379 posts
bagginsbill posted Wed, 01 September 2010 at 6:48 PM
Quote - Does anyone know what unit of measure they're using in LuxRender to work things out? bagginsbill I know you're using Poser Inches but they may not match whatever LuxRender uses for inches. Just a thought.
ps I just noticed I'm using Feet & not Inches, hey I'm greedy. ;)
Inside Poser, everything is in Poser Native Units (PNU). When you choose a Poser Display Unit (PDU) it is not changing the internal numbers. It is simply changing how those numbers are displayed in the Poser GUI. They're still in PNU inside.
The PDU conversion from PNU to inches is 103.200005 inches per PNU. There have been an extraordinary number of threads dealing with the fact that with this ratio, Daz figures are incredibly tall. However, the original ratio was 96 inches per PNU. Similarly, the current Poser metric ratio is 2.62128013 meters per PNU. Originally it was 2.4384 meters per PNU.
We're exporting Poser Native Units as is. For initial testing this has no impact. When we start to do displacement, it will. What this means is that the current PNU is passed to Lux as if it was 1 meter, instead of 2.6+ or 2.4+ meters.
So as soon as I can get out from underwater with work, I'll add the multiplier to convert Poser meters to Lux meters. It remains to be argued as to which of the two multipliers you want to use - the official current 2.6+ meters or the original 2.4+ meters.
I don't care either way. It's just a number I poke into the exporter. It could be a configurable parameter. The only reason it would matter is if you were trying to use assets (props, lights) that were made in something else, such as LuxBlend. If you wanted to mix and match stuff that isn't in the Poser scene with stuff that is in the Poser scene, you have to make a decision about how these things relate to each other, scalewise.
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)