I need help, guys

[mursu]

im bad at drawing mechanical stuff, so i shouldn't be giving advice on that to anybody.. but i guess for drawing robots you should study stuff like medieval armor, animals like crabs and lobsters, industrial robots, robots in movies and games (but i guess you are already doing that?)... and most importantly perspective.

i came across this video yesterday on shading, you should check it out http://youtu.be/-dqGkHWC5IU it will not help make your characters design look any less random, but i think it will help you to render better!