Particle System Constraints

This article contains speculation that needs to be confirmed.

Particle Constraints prevent particles from passing through certain areas, such as brushes. The can also be user-defined, such as a 2-Dimensional plane.

Prevent passing through a plane

Blocks particles from passing through an imaginary two-dimensional plane. Default settings make it at the bottom of the particle's origin.

global origin

Use global origin instead of particle origin? (Not recommended)

plane point

The 2nd Point to use to define the plane?

plane normal

3D vector that determines the angle of the plane (same concept as VPlane)

Prevent passing through static part of world

Prevents passing through any static part of the world. I.e. prop_statics, brushes, etc