After I posted my cel shader tutorial, I asked for more tutorial ideas on Twitter. A mutual of mine requested help:
I have a monster in mind that fades into invisibility. Perhaps a distorty purply glassy misty spooky type shader for the in-between? 😀
— Brannan Vitek (@brannan_vitek) November 6, 2017
Welp, here’s that tutorial, Brannan! XD It doesn’t have ALL of the qualities that you requested, but I think it does the trick for a magical-fade effect.
With this shader, you’ll be able to tune the color, speed, fade speed, size, and texture of the dissolve. For example, in the gif below, the green lingers longer, and the dissolve happens faster.
For reference, here’s the final code for the shader. Note that it includes code for a cel shader, so if you want to use the effect in your own lighting scheme, you’ll need to adapt this code for your needs.
Linden Reid 