photo texture

[eperdos]

ok, I`m quite new to this photoshop techniques, but I`m really curious how this texture was made. I can see the lightning is really great, but I can`t see how the texture is done:

http://photo.net/photodb/photo?photo_id=6738710

or:

http://photo.net/photodb/photo?photo_id=6425137

but I`m mostly interested about the first one...

thank you!