The FLIP solver is the industry standard when it comes to high-quality fluid solvers.
However, it greatly suffers from velocity noise which results in vortices (angular motions) breaking up very quickly, which is great for splashy and turbulent fluid motions but what if you don't want it to be turbulent?
Furthermore, the noisy nature of FLIP also shows significant displacements at the surface of a liquid, making it very hard to get a smooth surface out of the particles.
Last but not least, FLIP is bad at handling areas with sparse particle counts or clumped particles, resulting in even more motion noise.
And the artist has no way in getting rid of this noisy chaotic behavior...
Instead Effex 2.8 will have a new state-of-the-art APIC solver added to its toolset which eliminates all these "problems".
1. Completely conserves angular motion (vorticity)
2. Remains stable independant of the sparsity or clumping of particles
3. Is basically noise free
Now the Effex artist can control himself if, where and when he wants the fluid simulation to get turbulent without the algorithm dictating this.
This video shows a comparison between FLIP and APIC available in Effex 2.8.
Soon available at fluidsimulation.de
Buy Effex 2.7 (commercial) now & get a free upgrade to Effex 2.8 along with it.
Also check out these comparisons for even more APIC fun:
vimeo.com/180482291/511f1aa323
vimeo.com/181606464/b771dfa730
vimeo.com/180933824/e01c1742b3