Shadertoy Multipass Demopack for GeeXLab
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This article, the eighth in a series, explains how a vortex-based fluid simulation handles variable density in a fluid....This article introduces features to the simulations presented in previous articles: The fluid flow includes motion because of buoyancy-heavier fluid sinks, and lighter fluid rises. These new features facilitate visual effects with effects of variable density or (with additional rendering work) multiple fluids, such liquid-gas mixtures like water and air. It also lays the groundwork for upcoming features like thermal convection (hot air rises) and combustion (generating heat from chemical processes).