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Orientation

ParticleEmitter

ParticleOrientation

This property determines which orientation mode to use for an emitter’s particle geometry:

FaceCamera: standard camera facing billboard quad, default behavior.
FaceCameraWorldUp: face the camera, but rotating only on the vertical world-up Y-axis.
VelocityParallel: align particles parallel to the direction of their movement.
VelocityPerpendicular: align particles perpendicular to the direction of their movement.