During last Tangle U 2018 I taught the class Starfish Line Interrupted -- which also has a video lesson here. Among other things, it includes the step-out for Mooka3D. As a practice exercise, I had the participants create multiple strands of Mooka3D coming from different directions on the tile.
In this one, I used almost entirely gray Copic markers for shading, and I really like how it gave it a different dimension in various shades of gray. The picture you see peaking in the corner below is for my next lesson (coming soon!):
Here's a close-up: