''Preproduction Blueprint'' is a complete system for planning your game environments and level designs. This could be for a playable level or a game environment exploration to show off in a portfolio.
Planning process is called pre-production and what you end up with is a ''Preproduction Blueprint''. It is an essential step to finishing your projects. Unfortunately, planning tends to be a rushed part of the process or completely ignored.
Creating a game environment or a level design is very similar. Once you have an idea you have to go through the steps of: