Fluid Isosurfaces and Particles
=Isosurfaces=
The fluid simulator now supports several features that produce much better looking simulations. The most important of these is its ability to internally perform isosurface subdivision on the fluid mesh. This works similar to applying a subsurf modifier on the fluid object, only it works much better and allows for some great-looking fluid particle features.
It can be found on the third page of the domain settings. A value of 1 means no subdivision, each increase results in one further subdivision of each fluid voxel. The resulting meshes thus quickly become large, and can require large amounts of disk space. Be careful in combination with large smoothing values - this can lead to long computation times due to the surface mesh generation.
=Fluid particles=
Fluid particles have been substantially improved. In addition to the existing options to spawn normal blender particles, fluid particles can now create new geometry inside the fluid mesh. The particles make use of the new isosurface subdivision options, so surface subdiv must be greater then 1 for this feature to work.
Fluid simulations can look much nicer with this option, as it allows having lots of water droplets without requiring a large domain resolution.