Today i would to share wuth you one of the best level designer on Youtube, Maverick.
He made very stunning speed level design. We can see every step in the video to learn from him, how to use the application (Unity and Unreal most of the time). Those videos are very inspiring and the renderer is quite impressive for the time spent.
For those who would like to try, i have great assets to share with you if you want for Unity.
Those assets are ready to use in Unity, with example scene.
Let me know if you want it in comments.
The video of the level desin: