Probably the most significant changes are in smoke.c.
New functionality includes:
- support for adative time steps (substeps)
- write flow objects to grid structure so that Mantaflow can generate levelsets
- no more distinction between FLUID_3D and WTURBULENCE objects. Everthing that communicates with Mantaflow now lives in a FLUID object.
Reviewed By: sergey
Maniphest Tasks: T59995
Differential Revision: https://developer.blender.org/D3861
