The images here can be used in just about any graphics program that you can think of. They are usually bundled up into “sets” or collections. Commercial licenses are available for $3 per set or $1 for any single images. Redistribution of them as-is, in whole or in part, is prohibited.
Stock Images – These are just photos that have been taken for your usage in designs, for painting references, etc.
PNGs – These are images where the backgrounds have been removed. The elements are already “cut out” for your easy usage. Just copy and paste into your own designs, and you’re good to go!
