With the walls and floor dry (-ish), time to pick out the cave formations. At this stage we are panting things rather than simply colouring in all the plastic.
White, a little yellow oxide tint, and Global Colours Metallic Pearl acrylic impasto.
Sorry about the crappy quality of these photos.
I’m not 100% sure that the metallic pearl pops when mixed in with the paint like this – although … although the calcite definitely seems to have a luminosity to it when you move the pieces. It seems to be mostly transparent, so perhaps a better plan would be to point a layer over the top. I’ll definitely be putting it into the final highlight.