ok so i didnt really study some luminous goo, but I do have this finger puppet monster made out of luminous greeny yellow rubber, and I keep thinking i'd like to try and capture some of its properties.
this is a section of its arm close up:
and this is just a quick random sprite using the effect and pallette:
I think for something larger like the sprite, a few inbetween colours wouldbe helpful.
not sure its something Id use again, but its all practice.