Select the Simulate Smoke checkbox to include it in the simulation. Then, adjust it with the following parameters.


Master Effector - With Master Effector you can directly alter Smoke content of each voxel.


Smoke Buoyancy - This value defines the rate at which smoke will rise or fall. Negative values will result in smoke that is heavier than the surrounding air forcing it to fall, while positive values will result in smoke that rises.


vd Multiplier - This value is used in the case when you are using Variable Density Solver. It is a multiplication factor of Smoke Buoyancy and the final value is used by the vd (Variable Density) solver.


Dissipation Min. Dens - If smoke density goes below this value, it will fade according to the Dissipation Strength amount.


Dissipation Strength - The higher this value, the more rapidly smoke will diminish. This parameter is expressed as percentage of voxel value that will be lost.


These two parameters are useful if you want to constrain smoke to a smaller volume. Restricting computations to a certain volume helps keep the adaptive grid as tight as possible, which, in turn, improves simulation speed. This may be most helpful in situations where temperature is invisible and can be clipped.


Diffusion - Set the rate of smoke diffusion.


Sharpen - During the simulation the smoke tends to diffuse and dissipate which is usually not desired in the simulation. By using a moderate sharpening value (0.2 for example), the smoke can keep the details for much longer.


Sharpen Radius - Defines the width of the sharpening filter.


Sharpen: 0.0

Sharpen: 0.2 Radius: 1

Sharpen: 0.2 Radius: 2