Texture Hunting

I live next to a national monument, so after my restless sleep I picked up my digital camera and shot took some pics of the ground, a statue pedestal, and walls. I loaded them into the GIMP, made them seamless, and resized them. Here’s a sample pic of them. Looks like my game will be a shade of gray. I would have gotten some sky pics too, but it’s a bit cloudy outside. I’m unclear as to what the rules for pics from stock photo websites. If they’re downloaded during the compo, are they valid? Need to check the rules again. Not wanting to skirt any rules (and to go out for some air and coffee)  I gathered these textures. Back to work.