Level Design advice.

[GoranGaming]

Lighting!!!

Every time i play someones custom story, i begin judging the lighting! Make it realistic!
You can find different threads about realistic lighting.

Also make differences. It gets boring if it's the same wall you see over and over. Play with welders and broken walls. Remember turning grid off is your friend. Not your enemy

The grid is your friend when you want to build walls, etc. But when you want to make details, always turn of the grid. (Not in special cases)