Mixing different colour fires (in maya)

[tmcthree]

Hi, (sorry, noob question coming up)

Is it possible to have to different coloured flames in the same grid. So that they mix with each other.

I'm trying to get an effect where two "flamethrowers" fire at each other, each with a different coloured flame. But, as far as I can see, the simulation grid can only define the Color and intensity" once, globally for the whole grid.

I've found a tutorial which allows the mixing of fluids (in 3dsmax). I'm wondering if it's possible to do something similar in Maya for fire.
https://www.youtube.com/watch?v=J5d9w-nHvbE&t=268s

If it is possible, does anyone know a tutorial (preferably for maya) that shows the techniques required. Or what bits of the manual I should be looking at?

Thanks

[Svetlin.Nikolov]

Hey,

Absolutely doable:
- Go to the Output rollout and enable export of the RGB channel.
- Go to your sources, enable RGB and choose different colors for each source.
- Go to Rendering -> Volumetric Options -> Smoke Color and change it to RGB.

This is it

[tmcthree]

Thanks Svetlin, that's great.

[Morbid Angel]

Svetlin would be great to be able to mix different file nodes and other maya textures, via layered texture and get that supported in rgb or other channels. Lets say I want to have remapped noise with color in rgb, that seems not to work, or layering two file nodes also does not work.

[Svetlin.Nikolov]

Oh, didn't know that, will check it. Thanks!

[georgi.zhekov]

Hey - just checked stacking a few textures in a layered tex, file nodes and remapped color noises seem to work - can you get me an example scene where this is not working?

Thanks,

[tmcthree]

Hey,

Absolutely doable:
- Go to the Output rollout and enable export of the RGB channel.
- Go to your sources, enable RGB and choose different colors for each source.
- Go to Rendering -> Volumetric Options -> Smoke Color and change it to RGB.

This is it

Hi Stetlin,

So that seems to change the colour of the smoke. But the flame is still orange/yellow and controlled by the "color and Intensity" sub section of the "Fire" rollout.
What I was hoping for was to get change the colour for the fire itself. If I change the gradient in "color and Intensity" to a blue gradient I get what I'm looking for (but it effects all fire in the sim).
I tried switching the "based on" in the fire rollout to "RGB" but that doesn't seem to work at all. (the flame disappears altogether)

[Svetlin.Nikolov]

Ah, sure, if you need to set the color of the fire to the grid RGB, you should set it there and not in the smoke section. Please share your settings and we'll explain why it's rendering as it is

[Svetlin.Nikolov]

Hmm, if I might guess, the GPU preview still does not support using the RGB channel as fire color - it would be visible only if you set it as smoke color. Could it be that you are using the GPU preview and this is why your fire disappears? If you render it, it will show, however.

Cheers!