Collision Attribute
In the Collision attribute, specify how to control the particle's physical setup.

CPU Collision Attribute Parameters
Name | Description |
---|---|
Physics Type | Specifies how the particle interacts physically.
|
Collide Terrain | Includes terrain in particle collisions.
Default value: false |
Collide Static Objects | Includes non-terrain, static objects in particle collisions. This is
expensive.
Default value: false |
Collide Dynamic Objects | Includes non-terrain, dynamic objects in particle collisions. This is
expensive.
Default value: false |
On Collide | Upon impact with the static environment, the particle dies.
Default value: Die |
Max Collision Events | Limits the number of collisions that the particle can have in its
physics simulation. This affects only particles that have
Physics Type set to Rigid
Body.
Valid values: Default value:
|
Bounciness | Controls the elasticity for collision response. This affects only
particles that have Physics Type set to
Simple Collision. You can override this feature
by setting Surface Type. You can also use a special
value of –1 to have the particle die on first
collision.
Valid values: any Default value:
|
Collision Fraction | Determines the fraction of emitted particles that perform collisions.
Valid values: Default value: |
Collision Cutoff Distance | Specifies the maximum distance from the camera at which collisions
are performed. A value of 0 means infinite.
Valid
values: Default value: |
Surface Type | Selects from a variety of surface material types for the collision
behavior. If set, Surface Type overrides
Bounciness and Dynamic
Friction.
Default value: none |
Dynamic Friction | The coefficient of dynamic friction. If set, Surface
Type overrides Dynamic Friction.
This affects only particles that have Physics Type
set to Simple Collision.
Valid values:
Default value:
|
Thickness | Controls the fraction of the particle's visible radius to use for the
physical radius. This affects particles that have Physics
Type set to Simple Physics and
geometry particles that have Physics Type set to
Simple Collision.
Valid values:
Default value:
|
Density | Controls the particle density in kg/m^3. An example of a physically
correct value is Water = 1000 . This affects only particles
that have Physics Type set to Simple
Physics or Rigid Body.
Valid
values: Default value: |

GPU Collision Attribute Parameters
Name | Description |
---|---|
Depth Collision | Specifies how the particle interacts physically.
|
Cubemap Far Plane | Sets the far plane distance for cubemap depth buffer generation.
Default value: |
Die on Collide | Upon impact with the static environment, the particle dies.
Default value: Die |
Bounciness | Controls the elasticity for collision response. This affects only
particles that have Physics Type set to
Simple Collision. You can override this feature
by setting Surface Type. You can also use a special
value of –1 to have the particle die on first
collision.
Valid values: any Default value:
|
Thickness | Controls the fraction of the particle's visible radius to use for the
physical radius. This affects particles that have Physics
Type set to Simple
Physics.
Valid values:
Default value:
|