// PAINT

From Reddit user u/Lucastor34:

"To do that effect I basically bought some stock photo of paint, then add some turbulence displacement, do the same for all layers except one where I put the saturation down to zero, level up the contrast, set a luminance matte, put it on top of everything, and boom!

for the planet, just a turbulence displace, small gradient to give it depth, cut it all in a circle.

Add some particle worlds (particular), light camera movement, some color grading and there you go ! No need for a messy paint setup !"