Despite the existence of several add-ons for simulating fluids in Blender, Cell Fluids has garnered attention for two main reasons. First, it's entirely built using Geometry Nodes, and its creator, Boykhonov, was responsible for some of the most compelling user demo reels when new modeling capabilities based on Geometry Nodes were added to Blender's experimental branch last year. Second, because the demo reel shows its ability to produce beautiful results in a semi-interactive mode.

Despite the release of Blender 3.6 earlier this year, which introduced particle simulation support in the Geometry Nodes toolkit, Cell Fluids isn't actually based on particles. Instead, it's a grid-based tool that generates surface displacement, making it suitable for simulating larger bodies of water like rivers and oceans rather than fluids pouring from containers. It cannot reproduce effects like splashes or interaction with deforming objects. Nonetheless, it's compatible with Blender Cycles and Eevee rendering, and it's described as fast for interactive work, with simulations running in "semi-realtime" mode. Results can be baked into a static grid with flow map textures for final high-quality rendering offline.

Cell Fluids is compatible with Blender 3.6 and higher. The cost of the tool is $20.