Simulation: Houdini 13.0.331 FLIP
Collison mesh: VDB Source Volume (much faster than rigid body)
Main sim: > 50million particles
WW sim: < 1 million particles
Simulation time: 17 hours 250 frames with 4 substeps (1000steps)
Render: 3DS Max - VRay 3.0
Render time: 5 - 20min per frame including rendertime Frost meshing.
I used Zhu/Brison for the Frost meshing as the Anistropic method was just to slow for this test. Although the Anistopic mesh created much nicer small details!
Thanks to Igor Zanic for his simulation tips!