'''Collision Group''' is a property of physicalized objects in [[Virtools]], which is a string used for in controlling which collision of the specified object and other objects will be processed by the physics engine. Collision Group is ''not'' the same as the [[group]], as the latter is composed of objects.

Collisions of two objects with the '''same ''' Collision Group will not be processed by the physics engine, meaning that they will pass through each other on "collision".  Every , while every collision of objects with '''empty''' Collision Groups will be processed.