This was a weekly challenge where we had to do something about “the micro cosmos” or something really tiny. So I thought about going for an electronic microscope look and this was the result.
I wasn’t really trying to copy anything that exists, maybe those regular “amoebas” and the bubbly cells.
To make that shader I mixed a dark rough Principled BSDF with a Layer Weight and an Emission Shader node, then adjusted accordingly. And for the almost noticeably background I made a dark Voronoi Texture connected to Color Ramp nodes.
For the “amoebas” I added a Noise Modifier to each scale value.