My idea is to use a colour correct/colour lookup node in NUKE to transform my footage into a night time shot. From here I will complete fluid dynamic fire, sparks and models in Maya.
Create a fluid container. This works fine in either 2d or 3d containers, as the results are the same. However, if your camera moved around that I would recommend using the 3d container, because the last thing you want is for everyone to see that your fire is actually 2d. If you don't have a computer with at least 8GB RAM then it is very likely that playback in the Maya viewport will be severly slowed down if you use a 3d container. But the final results should be worth the time.
Set the base resolution higher in the 2d container for this reason. 3d users- your just going have to live with it I'm afraid. Use a lower base resolution such as 50-75 in order to speed things up.
Size your container appropriately.
With the container selected go to create emitter under the dynamics toolbar. Select the option box, because we need a volume emitter (shape= Sphere.)
Select your container, and go to its attribute editor.
Contents Method - contrary to popular belief, only use density and velocity. Leave temperature and fuel off.
Dynamic Simulation - damp - 0.100
- high detail solve - all grids
Content Details
Density - density scale - 0.650
- Buoyancy - 10.000
- Dissipation - 2.000
- Gradient Force - -60.000 (minus)
Contents Details
Velocity - swirl - 8.000
Contents Details
Turbulence - strength- 0.250
Select your emitter, and go to its attribute editor.
Under the Fluis Emission Turbulence change the Turbulence slider to 2.500. This will create enough noise to disrupt the flow of the fluid.
Play your simulation. 3d users, this may take a while to see the fluid take shape, but be patient. 2d users shouldnt have a problem playing the simulation. When shading your fluid be sure to have your fluid shape visible, as it will be essential in creating the correct shader for your scene.
Select your container, and go to its attribute editor.
Under the Shading tab we must turn off the colour altogether, as we will colour the fluid using the Incandescence. I've also found that accurately shading your fluid in a 3d container is much harder than a 2d container!
Of course, your shading is down to you. To create realistic fire, be sure to pay very close attention to the opacity graph. Small changes can bring subtle alterations which affect the overall look of your fluid.
(Below) My fire rendered at 100 base resolution. If you copy the attributes I have here then your overall outcome should look relatively realistic. This is a 3d container.
(Below) 2d container render.
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