Today I read a good new, that we can look to other types of slime molds ( myxomycetes, protostelids, not only dyctiostelids) so I had a look around.
What i found was a variety of them. One might look alien to another. There's a variety of shapes and textures as well as colours.
One interesting fact, Hieronymus Boch in his Garden of earthly Delights depicted 22 different slime molds ( try to find it!)
Also I looked at concept art of others. But just to see whats out there, not relating it with my work.