Rainbow Lists

Mosaics and Gessos allow the use of a media source, but since this isn't a fanfiction community that use is limited. Furthermore, there's a long tradition of turning one's role-playing game into stories, and many tabletop role-playing games (TTRPGs) draw from a variety of sources (see 1st Edition Advanced Dungeons and Dragons' famous Appendix N, as well as the inspiration page in many sourcebooks)

Here are some examples of what is and is not acceptable for crossovers (Mosaic) and borrowings (Gesso). If the piece is an alternate universe (AU) to your canon, the limits are a little looser. For examples, I'm going to use Dungeons and Dragons (DnD) and the Gothic horror campaign The Curse of Strahd, Star Wars, Star Trek: The Original Series. It's safe to assume that examples for crossovers can be extrapolated for borrowings and vice-versa.
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In short, trademarked names or words (Jedi, Sith, Waterdeep, Klingons, Vulcan, etc), should have little influence on the current plot or be an AU. But if just changing the names would make it not commonly recognized, it's okay.

If you've used 10, 30, 50, or any multiple of 50 of a supply, you've completed a goal and earned a banner. You can request a banner or take one of the generic banners.

Questions & Answers

• You can use prompts that are originally for art, writing, fandom, or anything else for Pastels, Palette Knife, Oils, Modeling Clay, and Resin.
• How many supplies am I allowed to use on any one piece? As many as you can make work. Some posts have almost 15
• What does 'updates regularly' mean exactly? We don't want you to use extremely old prompts for supplies. It should be from a source that updates at least monthly or has updated no more than two months ago.
• If I have a piece that used a daily or weekly supply, how late can I post it? We know writing takes time and the muse can be fickle. You can use a prompt that is current to when you started writing or when you post it (not both).

Palette Knife / Oils / Modeling Clay

• Can these overlap with Brush, Acrylics, etc? Sorry, no. These should be from other sources.
• Can I use a prompt from a list, for example a list created for a specific month? Yes, so long as that list isn't for a fest or specific challenge (for example a list for Inktober wouldn't qualify, but a list that's just for October could), and you aren't doing the entire list (if you are going to use the entire or more than two-thirds of the list that would be Pastels)

Pastels

• Pastels includes prompt lists, prompt tables, and bingo cards created for challenges and fandom events
• Pastels prompts can't also count as Palette Knife, Oils, or Modeling Clay
• What do you mean mod-generated or public card? We don't want you to generate a bingo card (or other prompt list) yourself, because then you could keep generating it until it's perfect. You can use a public card that's provided by the event host, or have a card generated by a mod or host at the community or by one of the rainbow mods (ask in rainbowlounge or by private message).
• Does that mean I can't veto or replace prompts? No matter where you get the card, one of the rainbow mods would be glad to randomly select replacements for prompts you need to veto.
• Can I use old bingo cards or lists? Yes! Lists or cards from previous events are totally okay, and you can ask a Rainbow mod to generate a bingo card for you using prompts from an old event.
• If use a challenge list, do I have to do the entire list? In general you should follow the rules of the challenge, however as long as you plan to use most of the list, it can count for Pastels

Canvas & Frame

• If I have a story or 'verse takes place over a long time period, what counts as before or after? We trust you to define that, but a good guideline is if it takes place before your main characters come into play, or after it, that counts. If it involves the main characters, if it takes place before or after the main story than it counts.

Gesso

• Examples of what is and is not acceptable
• This was designed to allow the use of tabletop role-playing games (TTRPGs) sourcebooks, but other media sources are allowed. The bulk of the story must be original.
• So I can write fanfiction, right? Not exactly. This isn't a fanfic community, so the bits you borrow should be minor.
• Can I use homebrewed ttrpg content? Yes.

If you know of any sites, Dreamwidth communities, Tumblrs, etc that regularly offer prompts, please drop the links in a comment below

Updated April 27, 2025 to clarify Resin