Hey everyone,
Wanted to ask you to look at this piece and tell me what you think of the lighting/shading, what would make it look more professional (i dont think it looks that good) and if its applied right here 


Also i wanted to ask this: When you draw certian objects/shapes how often do you use pictures as reference, lets say for example you want to draw a satellite (really random), do you look up pictures immediately or do you work out of memory/your mind, and how do you do this with human shapes (arms, legs etc.), i've always wondered this.

Thanks for replying