Is it a police public call box.... or is it the TARDIS?
If you don't watch Doctor Who, you won't get it. If you do... this will probably leave you just as excited as it left me when I spotted it
You must give me credit. It can be only in the description if it is used only on dA (meaning, even if it's uploaded on dA, you cannot post it elsewhere unless you are ONLY posting a link to it on dA). If the image itself is posted anywhere off dA, it better have credits on the actual image. READABLE credits.
Also, no re-posting as is. Just adding a color filter or something isn't enough - you have to add text, or manipulate it together with another image, or SOMETHING to make it your own. If you want to use one of my stock photos for an example of an action, however, you're welcome to do so - provided you ask first and, obviously, credit rules still apply.
I also require you show me your work. I want to see what you've done!
You're welcome to use any of these for sketching, lineart, etc. However, credit is still required if it is a replica or cartoon replica. If you were just using it for part of an image - for example, leg positioning of a horse - then no credit is required, though I'd still love to see it