Currently working on this one -basically still a sketch right now. Does anyone know some tips how to draw the creases at the arm (as it is bent) properly?
Anyone?
Start with general shapes, your proportions are off, as Thundersnow said, better go to the TW thread, it's not as dead and\or shit.
As for the creases, they go along with wherever the tension goes; generally in a bent arm it's 2 or 3 types of them: direct thrust, compression and one more I think, can't remember. Look up some images for reference or make your own.
PS:
Goddamn, why didn't you post that on TW, awesome!