User Created Content

The easiest thing to do would be to stick to a system that is OGL. Even then I would read the agreement to be sure, but for the most part those systems are designed with the idea people will write third-party adventures for them. Examples of that include D&D 3.5 and Pathfinder. If you want to get into other systems (D&D 4E, GURPS, etc.) then there are specific licensing agreements you'll need to consider. Obviously there are other 3rd party folks writing modules for those and there have been for some time (not on our site, but in general), so it's doable. You just may have to do more legwork to make it "official."  For art, we would require that all art (maps, tiles, tokens, etc.) included in the module is either a) originally created by you, or b) you have obtained an agreement with the creator to use it in your module (whether that's via a profit-sharing agreement, for payment, or for free because it's released under an open license; that's something you have to handle on your end). Of course, I am not a lawyer, so please do your own research, as I could be wrong on any one of these points :-).

Katie G. said: I am reeeeeally confused about all of this copyright stuff. I now understand that the "From the Web" section of the art token/map/etc. search is not necessarily fair game for free use - some of it might be copyrighted and thus off-limits for personal use. Am I correct in assuming that the "From the Marketplace" section is open to anyone to use for free? Unless, of course, the picture is at the top with a yellow background behind it and has a "Buy in Marketplace" link beneath. Is that more or less correct? Am I getting warmer? I just want to know what I can use without stepping on anyone's toes :p Everything on Roll20 (including the stuff on the Marketplace) is licensed only for personal use. If you want to create a commercial product, you are going to have to get in touch with the original author and get a license agreement for them. There is nothing built in to Roll20 that you can just take and start using in a commercial product without checking with the author first. As I said, there may be some authors out there who will be more than happy to let you use their art assets in commercial works (e.g. some of the folks on the Web Search may be fine with that). Others may want a revenue split, others may want up-front payment. But regardless, I would check with each author in advance, because honestly if you send us a module and the art isn't original, the first thing we're going to ask to see is a license agreement signed by the art's creator saying they are okay with you using it in your module before we could list it for sale.