I'd created this painting, because I wanted to see if I can simulate the background that was done in the Spider-man animated movie by Sony Entertainment. I have to created a bunch of half-tones, masked them with a solid color. Then used a lot of bright color gradients, blending layers to achieve that background effects. Yeah, lots of masking and blending layers
I've also created a depth map to be used on my Facebook 3D post, if you want to see it -- https://bit.ly/2JKaGl3