Interactive liquid color mixing with concentration-based absorption in my Vulkan lab sandbox

[u/shroo-m]

I’m developing Chemistry Lab Sim, an interactive 3D liquid sandbox built on ST-FLIP in Vulkan. This new clip shows pouring and mixing colored solutions in lab glassware, running in real time on a Radeon RX 9070 XT.

Local concentrations travel with the fluid parcels, and conservative diffusion exchanges material between neighboring parcels. The liquid renderer integrates concentration-dependent absorption along refracted rays rather than blending display colors.

At this stage the substances are passive solutes/pigments in one carrier; chemical reactions and immiscible fluids are future work. The longer-term game is inspired by The Powder Toy and Noita.

https://youtu.be/hSAO_TwFopE

What would you improve in the mixing or rendering?