D20
D20 is an environment for building cohesive worlds with a unified ruleset. A big part of it is an Unreal Engine Devkit currently in development. It contains everything you need for testing visual assets, architectural styles, and other asset types that could be imported into the game. Other parts of the creation toolset are contained directly in the game, so not being a game designer or an artist should not stop you from creating something unique that will present value to others. Every player is a creator; however, not every creator needs to be a player.
We are also building opportunities to use already existing assets in the blockchain space, outside of our contract family. Meaning you could use your favorite NFT assets as diverse types of decoration and ornaments. For both Architecture and gear customization.