I've created a Facebook group specifically for mythos RPG keepers and props makers to post images, 'how-to's, tips and tricks, etc. for making props for Mythos games. It's focused on props rather than art in general - items that you use to amp up the realism, atmosphere, or role-playing in your games (be they tabletop or live-action). I hope the MUP staff doesn't mind me posting it here. If it's a problem, let me know and I'll remove this post.
I realize not everyone likes/uses Facebook, but there are a large number of Mythos-related pages out there which tend to get contaminated with images of pies and hentai, and a large audience of folks who might be making props that haven't found their way onto these forums (yet). Feel free to join the group and post pictures or discussions of your props, documents, puzzles, or other items that you've made to help bring your game to life!https://www.facebook.com/groups/567682553357153/