Since everything I am doing right now is under lovely NDA, I decided to share my experience for #leveldesign portfolio demonstartion. Moreover, it is not a really well-known topic.
Usually, people use principle "the better, the higher on the page", but I decided to start as I start in the real life:
-References
-Level flow plan
-Killer-futures
-Art
Aaaaaaannnnndddd... Remember - no gameplay videos with comments.