Thank you !

Hi Steven,

You're right, the new stuff might not be obvious from the video. I actually made the video only to test if the new version is fit for production (stability, workflow, performance, etc.).

Here a brief list of the new stuff:

-> Multiple Fluid Boxes.
-> Automatic Fluid Box (= zero fluid boxes).
-> Fluid boxes can now be translated/rotated/scaled during simulation.
-> New "native" emFluid4 particle types (Waste, Flame, Smoke).
-> New shader compound for native emFluid4 particles.
-> Improved Workflow, better compounds and structure.
-> Improved Combustion, new data types (gas, waste).
-> New particle generation from actual grid content.
-> New compounds for data emitters, particle emission/behavior/colorization.
-> Improved Multithreading and Performance.
-> New ways to create the fluid velocity: a) the "old school" way by emitting velocity directly b) indirect velocity generation from buoyancy and/or expansion (good for fire and explosions) from heat and density c) a+b together, of course.
-> The cell size now can be modified during the simulation (=> start with a coarse resolution and then switch to a more detailed resolution when things start to get "more interesting").
-> Automatic generation of emFluid4 setups based on the actual selection (e.g.: select the 12 objects in your scene that shall burn, click on "create emFluid4 setup X" and you automatically get a fluid setup with all objects emitting emFluid4 data and each object with its own fluid box).
-> emFluid4 can be installed allong with emFluid2 and emFluid3, so that one can even use all three versions at the same time if he wishes.

I'll make some tutorial videos very soon to show the new stuff :)

Cheers,
Eric

If you mean the obstacle stuff:

Go into the "Solver" compound. There you will find the "Solver advanced" compound which has input ports for the obstacle stuff.

I'm working on an emfluid 4 version of your photonic explosion scene, everything is working fine except when I plug a collider mesh (of any kind) into the "in geometry" of the emfluid4 solver advanced node the particles are still going straight through. The 4 variables under "obstacles" don't help it either.
do you know what i might be doing wrong?

you probably are using the automatic fluid box mode. In order to have working obstacles you must use "Manual, all Boxes" or "Manual, only alpha Box".
Please also check out the online doc:
mootzoid.com/wb/pages/documentation/emfluid4.php
Search for the keyword "obstacle" and you will find some hints and information concerning obstacles and the obstacle parameters.