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{{wrongtitle|title=func_smokevolume}}
{{base_brush}}

==Entity Description==
A [[brush entity]] that spawns smoke particles within its volume, commonly used for large, localised areas of fog. Use the [[tool textures|trigger]] texture or the [[tool textures|fog]] texture.

{{sfx_brush}}

{{note|The default [[material]] is <code>particle/smoke_grenade1</code>, which does not exist. However, <code>particle/particle_smokegrenade</code> does.}}

==Keyvalues==
* {{KV Targetname}}
* {{KV EnableDisable}}
* '''Color1'''
: {{color}} Particle color 1
* '''Color2'''
: {{color}} Particle color 2
* '''material'''
: <material> The material to use for the particles.
* '''ParticleDrawWidth'''
: <float> The size of the particles, in units/inches/
* '''ParticleSpacingDistance'''
: <float> The distance between the particles inside the volume. The lower the number, the denser the particles, and the more overdraw there will be. It is best to keep it as high as you can without it looking bad.
* '''DensityRampSpeed'''
: <float> Time to go from density 0 to density 1, in seconds.
* '''RotationSpeed'''
: <float> The speed that the particles should rotate, in degrees per second.
* '''MovementSpeed'''
: <float> The speed that the particles should move around, in units/inches per second.
* '''Density'''
: <float> Particle density, from 0 to 1.

==Flags==
* 1 : Emissive (Changes how the smoke particles are drawn. Emissive is 4 times more expensive to render.)

==Inputs==
* {{I Trigger}}
* '''SetRotationSpeed <float>'''
: Set the particle rotation speed (in degrees per second).
* '''SetMovementSpeed <float>'''
: Set the particle movement speed (in inches per second).
* '''SetDensity <float>'''
: Set the particle density. It should be a range from 0 to 1.

==Outputs==
* {{O Trigger}}