You may not even need more than one channel for an effect - even in a high quality production. You can start by using only the temperature channel (disable the others) and see what different effects you can get just by varying the emission pattern and animation.
Maybe use several small objects instead of one big one, use particles, animate the intensity of the emission, etc. You'll want to try various settings for the emitter texture scale, octaves and contrast. But, and that's the point here, essentially the result will be what you painted at the source. The fluid simulation will then add velocities that let your "paint" flow, curl and/or expand. Yes to more dust Surface Imperfections: Smudges 50 high-resolution textures to add smudges, smears, and water damage to your perfect 3D surfaces, giving them depth and realism. Install with a click through the Plus Library. You paint into one or more of the fluid channels (similar to painting into the RGB and/or A channels of an image) using emitters. 25 high-resolution textures to add some dust to your perfect surfaces in Cinema 4D. In fact, the container works pretty much like a 3D pixel image. You can think of the emitter as a brush used to paint in a pixel image. One important aspect of controlling a fluid simulation (if not the most important one) is to create the right emitter setup.
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