Howdy, I'm new to this rap game. While up til a ridiculous hour on yet another moho-addicted night I figured out how to do this effect... I don't know how well-known this technique is but i thought it worked wonders for my "artwork". Much better than just the standard pansy shading. Before...

My personal method of choice is the play button

I'm pretty sure all you need to do is use the select points tool (I'm talking about the button with the little dotted box on it, it's like the first button out of all the drawing tool button things) and just click in the middle of your shape, the same way you would when using the select shapes tool ...