Particle Flow includes the ability to generate particles from specific locations by “painting” particle generators, or seeds, on object surfaces. The toolset for doing so includes the Particle Paint helper and the Placement Paint operator.
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Particle Paint
The Particle Paint toolset lets you use a spray-paint metaphor to specify arbitrary areas of object surfaces for emitting particles. To paint particles, you first apply particle “seeds” to one or more objects with the Particle Paint helper, and then use other controls to specify how the seeds should generate particles.
Birth Paint Operator
The Birth Paint operator uses a Particle Paint helper as a reference for creating particles. With the Particle Paint helper, you place particle seeds on an object with a specific pattern and timing. The Birth Paint operator creates particles from these seeds, initializing particle position, rotation, mapping and selection status.
Placement Paint Operator
The Placement Paint operator uses a Particle Paint helper to acquire particle seeds from which to generate particles. Placement Paint sets particle positions, rotation, and mapping.