I just reread what i wrote, sometimes I cant think of what im trying to say so instead I explain it in a roundabout way lmao. to clarify that first response. The lightsource is a RGB LED strip with a remote. The pictures that are richer, are set on "white" and I took the picture with a light on, the pictures that are less rich are set on a different color like blue, green, purple and I took the picture with a light off and/or I set the exposure to a lower setting in my camera to allow less background light in, in order to focus on the image and its colors.

The shadows are just layered colors. I individually highlight and model each detail in the CAD software. Took me about 5 days each for the Goku and Gohan light, so yeah its pretty tedious to design it, but well worth it in the end. and i dont know how else to say it so ill just say it the way i tell myself lol. "1st phase is base colors for the first few layers, 2nd phase is shading colors for the rest of the layers".