Here is design concept of navigation element. My idea was to create navigation as part of primary composition, not outstanding element as I used to see. So mostly it is experiment to use navigation to fullfil picture and make it both - side interractive.
I find this conception interesting and hope it could help focus user's attention on content, not navigation and functionality of service0If you find something useful — you can grab source sketch file (free to use). Comments and likes are welcome. You may grab source sketch file (free to use) here