March 24, 2014

How to turn a curvy hand movement to a straight one?

I've been shading for a while now and one of the things I constantly struggle with is making a straight line while shading. I see all these shaded elements on other peoples sketches and I just don't understand how they do it. Even if I turn the paper to make a horizontal line it is still becomes curved.

What am I doing wrong here? Any advice?