Legacy Documentation: Version 2018.2 (Go to current version)
3D Physics Reference
Capsule Collider
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Box Collider

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The Box Collider is a basic cube-shaped collisionA collision occurs when the physics engine detects that the colliders of two GameObjects make contact or overlap, when at least one has a rigidbody component and is in motion. More info
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Property: Function:
Is Trigger If enabled, this ColliderAn invisible shape that is used to handle physical collisions for an object. A collider doesn’t need to be exactly the same shape as the object’s mesh - a rough approximation is often more efficient and indistinguishable in gameplay. More info
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is used for triggering events, and is ignored by the physics engineA system that simulates aspects of physical systems so that objects can accelerate correctly and be affected by collisions, gravity and other forces. More info
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MaterialAn asset that defines how a surface should be rendered, by including references to the Textures it uses, tiling information, Color tints and more. The available options for a Material depend on which Shader the Material is using. More info
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Reference to the Physics Material that determines how this Collider interacts with others.
Center The position of the Collider in the object’s local space.
Size The size of the Collider in the X, Y, Z directions.


Box colliders are obviously useful for anything roughly box-shaped, such as a crate or a chest. However, you can use a thin box as a floor, wall or ramp. The box shape is also a useful element in a compound collider.