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Volumetrics: Combustion Added on: Sun Aug 20 2000 |
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Characteristics
Here you have flame size, this controls believe it or not, the size of the flames. Essentially the smaller the flames the more there are, but if they get too small they becoem like confetti and look very ugly.
The bigger they are they become very soft and it also looks ugly. A safe value is anywhere between 10.0 and 35.0. The default value is 35.0.
Density controls how thick the fire is in a way, how transparent or dense the fire is. If the density is too low the explosion will lack colour and if there are other objects in the scene (eg. a non black background) the explosion will be very hard to see because it is so transparent.
But if it is too dense there will be colour bleeding because the inner colour will have higher majority over the outer colour. If you look below at the density values demonstrated. between 15 and 30 looks exceptable, and maybe 100 to demonstrate extreme heat in the explosion, but anything other than that looks out of place. The default value is 15.0.
Flame detail is similar to flame size, but is more designed for the edges, the values are limited from 0 to 10, and with a value of 0 it looks very round and blurry, with a value of 10 the edges are very detailed and crisp. The default value is 3.0.
Samples also controls the detail, samples is more the volumetric detail, the smaller the value the quicker it will render, but you will need a balue between 15-30 for the combustion to look exceptable. Anything above 30 isn't worth it since the detail will not be noticable and will render a lot slower. The default is 15. 20 is a good value to use.
Motion
Phase is a timeline which controls the birth and death of the combustion. 0 is default, but as it cycles through it dies out at later values.
Whilst it phases the pattern changes, the faster it's animated the more furious the pattern cycles. Essentially phase is like a seed, a mathematical algorythm. You need to animate this value adjusting, or use the explosion feature metioned just a bit further down the page.
Drift conrols how quickly or slowly the fire animats in the Z axis. Meaning it will rise quickly or slowly upward.
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