This attribute is set automatically by the Add Point node as well as compounds that contain it, such as the . However, note that if positions instead of locations are connected to Add Point, as is the case for Emit from Null and Emit from Position, then this attribute is meaningless.
You can also use this attribute with different properties of an object, such as weight maps or texture maps. For example, you can use a texture map on a particle emitter object to color each particle based on its emit location.
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