My desk is made of frosted glass and I put my phone down with the camera app loaded. So I proceeded to put things underneath the table like a post-it note, book ends, a Snapple drink, my hand, etc to "create" these backgrounds. Done really quick and gritty with my iPhone. Images are 1936x2592. Anyway here they are for you to enjoy. Download the zip attached.
Please note: these are iPhone pics so there is a small amount of noise. Give it an additional blur to get rid of them.