# MarrowMyth > MarrowMyth builds fully realized worlds and learning engines you can step inside — every one powered by Materia, its in-house creative technology. Founded by author F.C. Marrow. Commission your own world, or play the ones already built. ## What is Materia Materia is MarrowMyth's proprietary creative technology. It powers four kinds of experience: World Engines (open, roamable AI-driven worlds), Story Engines (hand-authored, offline interactive fiction), Practical Engines (learning and utility tools), and bespoke Web Experiences (custom immersive websites). Signature systems include evolving character relationships, a living locations map, and "pocket recall" that gives engines near-eidetic memory while saving tokens. ## Engines & Worlds - [What is Materia?](https://marrowmyth.com/engine.html): The engine concept, explained. - [World Engines](https://marrowmyth.com/world-engines.html): Fully realized fictional worlds made playable. - [Story Engines](https://marrowmyth.com/story-engines.html): Hand-authored, choice-driven interactive fiction — no AI, no key, fully offline. - [Web Experiences](https://marrowmyth.com/web-experiences.html): Bespoke, atmospheric custom websites. - [Practical Engines](https://marrowmyth.com/practical.html): Learning and reference tools built on Materia. - [RE: Rebirth](https://marrowmyth.com/world-re.html): Live World Engine — survival horror trapped in an endless, Umbrella-engineered simulation of the Raccoon City incident. Free to play. - [Fallout: The Windy Wasteland](https://marrowmyth.com/world-fallout.html): Live World Engine — post-apocalyptic Chicago. Free to play. - [FFVII: Reclaimed](https://marrowmyth.com/world-ffvii.html): Live World Engine — an alternate Final Fantasy VII where the Summons rise to reclaim the Planet and wage war on the Weapons. Free to play. - [The Norse Codex](https://marrowmyth.com/norse-codex.html): Live Practical Engine — a rigorous, sourced reference for Norse history, mythology, and Old Norse language, with live pronunciation and a rune writer. Free to use with your own AI key. ## Studio Saves & Session Exports Download player- and MarrowMyth-made worlds (.mmworld files) to load and play, and read shared playthroughs rendered in each engine's own style: - FFVII: Reclaimed — [Studio Saves](https://marrowmyth.com/world-ffvii-saves.html) · [Session Exports](https://marrowmyth.com/world-ffvii-sessions.html) - RE: Rebirth — [Studio Saves](https://marrowmyth.com/world-re-saves.html) · [Session Exports](https://marrowmyth.com/world-re-sessions.html) - Fallout: The Windy Wasteland — [Studio Saves](https://marrowmyth.com/world-fallout-saves.html) · [Session Exports](https://marrowmyth.com/world-fallout-sessions.html) ## Tools - [Comfy Console](https://marrowmyth.com/comfy-console.html): A free, private, local AI image studio — a simple control panel that sits on top of ComfyUI so you get LoRAs, ControlNet, face/hand/foot detailers, tile-detail upscaling, a full edit suite (paint-fix, no-AI clone/heal removal, erase, extend), and optional in-app LoRA training, without the node-graph complexity. Runs 100% on your own PC; no account, no data collected, no limits. [Full setup from zero](https://marrowmyth.com/comfy-console-setup.html) · [How-to guide](https://marrowmyth.com/comfy-console-guide.html). - [Materia Browser](https://marrowmyth.com/materia-browser.html): A free, privacy-hardened desktop web browser, MarrowMyth-themed. Runs on your own machine. ## Membership & Commissions - [Commission a World Engine](https://marrowmyth.com/commission.html): Commission a custom engine built around your world or story. - Marrow Members get access to every Materia engine and a 20% discount on engine commissions. ## More - [Updates](https://marrowmyth.com/updates.html): Release log — engines, systems, and changes as they ship. - [FAQ](https://marrowmyth.com/faq.html): Common questions about Materia, API keys, costs, and access. - [Contact](https://marrowmyth.com/contact.html) - Discord: https://discord.gg/NnU6EJjJFf - Patreon: https://www.patreon.com/cw/MarrowMyth