What does Building Projection Map mean, and what contributes to the time it takes to complete?

thoreandan

I've tried searching around and found very little information about what it means when you open a scene file and Daz Studio is "Building Projection Map".  The few references to this step I've found in the forums were people having an issue where it locks up during that step, and there was either no response at all or attempts to solve what might be the problem, but nobody actually explained what the software is doing or what a projection map is in this context.

The reason I am curious about this is that some scenes will take a very long time to complete this step, while others will only take a few moments, and I can't really predict which will occur based on scene contents or size. If I knew what it was actually doing from a technical perspective I might be able to work around it somehow.

Thanks.

Richard Haseltine

Projection is used to transfer ("project") morphs and rigging from one model to another - as far as I know, the projection maps (one per item) are used to match vertices on the source with vertices on each destination. Since content will already be rigged I would assume that when you see this on loading it's mainly being doen for morph projection (for giving clothing a morph to match the moprh on the base figure when it doesn't have its own built-in version of that morph). How ling it takes would then be a function of the number and mesh density of fitted items.

(Which Rob, I think, confirms - though he just says geometry rather than vertices in particular so I may have that bit wrong.)