heatherhorns mentioned (on Mastodon) how much fun goop was to draw, and I had to admit I haven't figured how to draw it in a way that really works for me. Nothing to do about that than try, though, so I went for this and ... mm. I got the melty right, but there's not enough sense of, like, gelatinous body here. I'll figure it out someday.

Turning the opacity down to about 80% worked for this, although it'd be better if I had drawn the hidden lines in.