Tech Art Director of Research and Development at Gearbox and Founder of Overdraw.XYZ Ryan James Smith has recently shared a couple of demos showcasing an upgraded version of the custom-made multigrid fluid solver plug-in, first shown back in late 2022.
Created with Unreal Engine 5.1, the enhanced plug-in features "particle advection and proper sourcing" and enables the creator to set up gorgeous real-time visual effects that run at around 60 FPS on an RTX 2080 GPU. According to the author, the solver is being made for a personal game project and will not be released upon completion.