The Engine
MarrowMyth Materia is an original proprietary narrative system created and maintained by F.C. Marrow. The engine itself — its structure, systems, mechanics, and framework — is and remains the exclusive intellectual property of MarrowMyth and F.C. Marrow. All rights reserved.
This applies to the engine concept in all of its forms — World, Story, and Practical engines, and Web Experiences. When you commission an engine, you receive full rights to use, run, host, and share your delivered engine and everything you create with it; your world and your content are entirely yours. The underlying technology is not. The Materia engine code and systems may not be reverse-engineered, decompiled, dismantled, reconstructed, repurposed, or shared — nor used to build another engine — without the express written permission of MarrowMyth. In short: do whatever you want with your engine and your world; just not with what makes it an engine.
Your Content
The stories, characters, settings, lore, and creative content generated within a Materia Engine by its users are the intellectual property of those users — provided that content originates from their own original ideas. MarrowMyth makes no claim of ownership over user-created narratives or original worlds built and played within the engine. You made it. It's yours.
MarrowMyth has no access to the stories played within any Materia Engine. F.C. Marrow does not see them, does not record them, and holds no claim over them. No data from your sessions is collected, stored, or reviewed by MarrowMyth in any form. What happens inside your world stays in your world.
Third-Party Intellectual Property
Some Materia Engine applications — including fan-made worlds and collaborative roleplay utilities — may reference or incorporate elements from pre-existing third-party intellectual property. These uses are strictly non-commercial, unofficial, and intended solely for private, personal enjoyment. In these cases, any third-party IP remains the property of its original owners. MarrowMyth claims no ownership over it, and neither does the user.
Any pre-existing intellectual property, trademarks, copyrighted materials, settings, characters, or brands presented or referenced within any Materia Engine application remain the exclusive property of their respective owners and creators. No ownership, challenge, or claim is asserted over any third-party intellectual property by MarrowMyth or its users.
Materia Engine applications utilizing third-party intellectual property are provided strictly for private, personal, and non-commercial fanfiction, collaborative storytelling, and roleplay purposes. They are not intended for sale, public distribution, monetization, or commercial use of any kind.
Generated Content
MarrowMyth and F.C. Marrow accept no responsibility for the content generated by any Materia Engine once it is in the hands of the user. The nature, direction, and tone of all generated content is determined entirely by the user — through their own inputs and their own chosen AI provider. A Materia Engine is a narrative framing device, not a content generator of any particular kind; whatever a provider returns in response to a user's inputs is governed by that provider and is the user's sole responsibility.
Content restrictions are the user's responsibility. The tools to set and adjust those restrictions are provided within the engine itself. MarrowMyth does not monitor, moderate, or control what users generate during their sessions.
No Infringement Intended
No copyright infringement is intended. All rights to original third-party intellectual property are acknowledged and respected. Any unauthorized use, reproduction, or distribution of Materia Engine content or utilities is prohibited.
Original Intellectual Property
All original worlds, characters, lore, and settings created by F.C. Marrow are the intellectual property of their creator and may not be reproduced, distributed, or used without permission. This includes but is not limited to: AYEI: The Broken Seed, The Afflicted, Tempestsea, Where the Wind Lives, and all associated characters, factions, settings, and narrative content originating from F.C. Marrow. All rights reserved.
Custom Commissions
A Patreon subscription is not required to commission a custom Materia Engine. Patreon membership grants access to F.C. Marrow's own personal worlds; a commission is a separate, standalone service. You bring your concept, and MarrowMyth builds your world — no ongoing subscription needed.
Every custom-commissioned Materia Engine is delivered to run locally on the commissioner's own system. It lives on your machine — yours to keep, yours to run, with no dependency on MarrowMyth's servers or any continued membership to access it.
Member Access
Members reach F.C. Marrow's original worlds by signing in with Patreon — there are no passwords to manage. Your membership is verified directly with Patreon each time you log in, and access is tied to your active membership: if it lapses, access pauses, and it returns the moment you rejoin. Your login is yours alone — please don't share member access.
For commissions, custom Materia Engine inquiries, or general questions, please contact us here.