"The request for "the point cloud of the hand as seen from the camera or a depth map (each pixel)" would generate alot of data."

That was my thought, but perhaps the  intent is to manipulate the data and extract or transform it into something less bulky. If the whole enchilada is being stored, I guess I'd look at using some form of BLOB storage. Then again, 'database' may not refer to a typical SQL database which is what I'm familiar with. It does sound like a fascinating project though :-) Whether tis best suited to Poser, IDK.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken