Wang is obsessed with space.
I created a new brush to help me make those stars.
Brush Tip Shape: Spacing 1000%, Hardness 39%
Space Dynamics: Size Jitter 100% Pen Pressure, Minimum Diameter 40%
Scattering: Scatter 1000% Control Off, Count 1, Count Jitter 7% Pen Pressure
Dual Brush (I picked one of the textured brushes and made the diameter bigger than the origianl) Spacing 1%, Scatter 223%, Count 6
With this Brush I just scribbled randomly where I wanted the stars, and they sort of fell in place randomly. I also then decreased the size of the brush and did it again, to add more depth.