topic Body Spray on Lighter (Couldn't find anywhere) in Bifrost Forum

Body Spray on Lighter (Couldn't find anywhere)

Anonymous — Sat, 09 May 2020 23:49:49 GMT

Hi,

I spend quite some time with bifrost graph and have hard time to find solution for this effect.

Spray / Mist which is coming from a spray container is lit by the spark, and then turned into fireball.

At the moment i tried to split the effect into two parts but even so i cant find a way to emit source_fuel into direction or give initial speed.

I also tried creating N particles and setting them on fire in Bifrost but that gave me rather meteorite effect (since they are separate sources of fuel which are not affected by each other)

Any help would be appreciated 🙂

Here is very good video as an example:

https://youtu.be/GYk3gZBLfrg?t=11

Re: Body Spray on Lighter (Couldn't find anywhere)

Anonymous — Sun, 10 May 2020 17:02:30 GMT

Update: so far i managed to fo back into nParticles and have the mist or either fire emitted from the particles which gives me the result with only one think missing... and that is the torch/spark which would ignite the fuel source middle way.

Re: Body Spray on Lighter (Couldn't find anywhere)

mspeer — Mon, 11 May 2020 03:22:39 GMT

Hi!

Basically I don't know where and how this gonna be used, so it's hard to suggest something specific.

Based on the provided reference video I might have chosen a simply particle / sprites animation.

But of course you also can use fluids only or a combination with particles.

For something like slow motion maybe I would use fluids only, also setting an initial speed for source air worked fine here.

If you don't simulate the ignition with fluids you can still use other attributes like age to control this effect or even do this in post (blend in a second layer), as the ignition is so fast.

Re: Body Spray on Lighter (Couldn't find anywhere)

michael_nielsen — Tue, 12 May 2020 09:12:40 GMT

You can also try the following:

(1) Start from a basic combustion compound

(2) Setup the air source to emit fuel at room temperature (e.g. 20 degrees Celcius) and use the initial speed and direction to model the spray. You can emit a bit of fog density too if you want the spray to be visible.

(3) Create a second source air to ignite the fuel mid-way. E.g. set the temperature to 600 degrees Celcius. This source should just set the temperature, not emit fuel nor fog density.

If the spray rises too much the buoyancy can be adjusted.

Cheers,

Michael