I want to set up a shoot of some items in a light tent that are lighted all around the subject. To do that I want to place the item on a piece of glass that is lighted from below as well as above and to the sides. My question is: Is there a specific type of glass I should try to get or just any old glass will do? I'm thinking that there are many types of coatings and such for glass and some may refract light in ways I don't want but I don't know enough about it. Anybody dealt with this issue before? I didn't find anything in a search of the site.