Smoke Force
Carry particles along with the flow's smoke and fire: sparks, embers, ash and dust swept up a plume and round its swirls.
Particles carried by the flow's gas, its smoke and fire, going as fast as the gas where they are: sparks, embers, ash and dust swept up a plume and round its swirls. Strength is how much of the gas's speed they take each second (1 drifts, 10 follows it closely). Where there's no gas the air is still, so they slow down. Needs a Smoke Source somewhere in the flow.
- Add it
- EventAdd OperatorForcesSmoke Force
- Sends on
- Nothing: it has no wire.
- Influence
- Yes: it works only on particles whose value is above a half.
When to use it
- Sparks and embers rising from a fire, caught in its swirls.
- Ash and dust lifted by a smoke plume or the wind of an explosion.
- Anything light that should go where the gas goes, rather than in a swirl of its own from Turbulence.
The gas comes from a Smoke Source somewhere in the flow, often in another event: a fire's own particles give off the gas, and a second event of sparks rides it.
Settings
As the flow editor’s sidebar shows them. Changing any of them marks the bake old; those marked Keyframable can also change through a bake.
One of the flow’s number values, to weigh it by, particle by particle. Empty for all of it, on all of them. See Influence.
Strength is how much of the gas's speed the particles take each second. At 1 they drift, lagging behind the gas and flung out of its tight curls, like heavy embers. At 10 they follow it closely, like fine ash. Where there's no gas the air is still, so particles leaving the plume slow down, as Drag would slow them.
The particles read the gas as the last frame's step left it, so they're a step behind it: too little to see.
Works with
- Gravity: heavier embers fall back out of the plume as it slows. Strength sets how light they are.
- Spawn and Delete for sparks that come and go.
- Colour and Age to make sparks glow and fade.
- Influence: a value can make some particles follow the gas more than others.
It reads VecFlow's own gas. With NVIDIA Flow as the solver it does nothing.
Problems you may see
The editor raises no problems of its own for Smoke Force.