Fuel
Fuel works like a cloud of combustible gas like propane or gasoline mist. When it burns, it...
emits
Burn which then represents the burning flame expands the cloud (i.e. it emits pressure)
emits heat (see Temp. Emission)
emits soot (see Density Emission)
reduces the amount of fuel left
Fuel Masking allows you to control where fuel burns. The Fuel Mask is a cloud taken from any other channel, smoothed and re-mapped. Only within that cloud the fuel will burn. This allows you to control ignition and suffocation of burning fuel.
| Active | Check this to enable simulation and caching of the fuel channel. |
|---|---|
| Clip Below | If the Adaptive Container option is enabled, this value defines the minimum temperature that will cause the container will consider non-empty. If this value is zero, no voxels containing temperature will be lost. However, often shading settings are such that low values aren't visible anyway. In this case, increasing this threshold allows the sim to keep the container smaller. |
| Fuel Diffusion | Specifies how fast fuel diffuses (see Temperature/Diffusion above for more details). |
| Burn Rate | Specifies the amount of the fuel that is burnt in every frame. The faster it burns, the more Burn and Temperature will be created. Burn Rate works like linear decay in the |
| Fuel Mask Channel | If a channel is selected, fuel masking will be active. See the simple-ignition example for a setup using the Burn channel. |
| Fuel Mask Smoothing | Before using the selected channel as a fuel mask, it can be smoothed or blurred. This will also make the cloud a bit larger, thereby propagating the ignition front like you would expect it to. |
| Fuel Mask Mapping | Re-mapping the smoothed fuel mask gives you control over the shape of the fuel mask and how steep the ignition front is. A flat increase will let the burn start slowly the larger the fuel mask values become. A steep increase will makwe the fuel burn at the full burn rate as soon as it touches the fuel mask. |
| Expansion | A factor that specifies how much the gas expands per burnt voxel of fuel. |
| Temp. Emission | Specifies how much heat is generated per unit of burnt fuel. |
| Density Emission | Specifies how much density is generated per unit of burnt fuel. |