PhoenixFD must connects via Birth Flow or Birth Fluid??

[tyFlow]

I'm assuming you're using v0.16034, which now supports any object that exposes the IParticleObjectExt interface as input into Birth Flow. PhoenixFD grid objects export that interface because it's possible for them to have liquid particles. However, that doesn't mean they *will* have liquid particles, and tyFlow has no way of knowing if they do or not somewhere in their cache. So you can add them to Birth Flow if you want, but it only makes sense to do that if they have liquid particles.