Thanks for reply Pilou,

I tried Flow but couldn't get what i want with flow/deform. Either i don't understand how it works or thats not possible with that tool :(.

Basically i want to keep my object shape (not flatten/deform it in all axis) but just bend one part of "U" letter side.

Something like this (in polygons)

stage 1
http://prntscr.com/pjbhzg

end result
http://prntscr.com/pjbi7e

so i used rotate/bend falloff tool so i can bend/rotate form picked point and i can bend more or less in certaia areas with falloff.