The map I made out of card to show level design, the arrows show the player and enemy movements in a survival wave based game. The orange areas show areas of conflict between them. This was used to help pacing.

I tested the level under different lighting to find areas which could be shadowed that could help during gameplay for example suprising the player with poorly lit enemies

The player being able to shoot between two silos if the player was skilled enough to cater to more experienced players.