Let's take a look at how to draw a dog in 7 easy steps. In Photoshop you'll find ... from the darkest edge towards the light ...

And it gives suggestions on how to draw certain patterns, like patches or stripes, and gives you the direction of drawing different fur strokes. While the drawing guidelines make it very easy to ...

So, that's how I draw. Blend the shadows, pulling from the darkest edge towards the light source. It helps it feather out a ...