previous www.patreon.com/posts/31301222
This is the recently upgrade version
The color parts. I personal think this is best way for shaping because normally when sketching have to erase a line and draw a new one to replace it . Color parts it only need one draw to change the shape. And getting the reference lines simply use Photoshop "Find Edges"
And the rest of things is inspire by my experience of Blender ( I‘m not very good at it but learn a lot of things from it ) the reference ball came from the idea of Matcap. To add more realistic the idea of Ambient Occlusion is very needed
for more information you can download the PSD file