I've been noticing that a number of packages I have, either from free stuff or the marketplace, contain the same texture bitmaps for things like rusty metal, wood etc. There is a particularly common wood texture called Wood621.jpg that keeps cropping up. There are also some common reflection bitmaps that appear in different products. Are these textures actually public domain? Or are they being used by vendors with the permission of the originator? If there is a source of public domain textures, could someone post the address please?