I get it. But, a design doc wont weed out anyone. Even if devs join your project, they can be given tasks and sit on them. I’ve suspect some devs have joined just to steal ideas and assets. Lurkers and Thieves. You need many other safeguards in place at all levels of dev.
But your killing any interest at the door, prior to entry. No one needs to work on your project for FREE when they can work on their own. Would you work on someone else’s project for free instead of your own?
So, I’m not even interested in reading your game doc. Show me proof you want to make this game. I want to see videos that show your skills, determination, and creativity to make this happen.
Show me you → carried some of this knowledge over to Unreal, I’ve also worked on blueprints, and some c++.