With the ParticleToGeo node, you can create 3D geometry for your particles. If you have a 3D geometry object connected anywhere in your particle stream, ParticleToGeo takes the particles and turn them into 3D objects for example for use in the Viewer or Scene node. ParticleToGeo make copies of the geometry used in the particle input to emitters, one for each instance of the particle. Use the ParticleToGeo controls:
• channels - select the channels you want to apply particles to. Channels a and b are arbitrary names for channels which are useful if you want different particle force nodes to have an effect on separate channels.
• start frame - set the frame from which you want to see the effect. This allows you to not start from the point when first particles are emitted, but skip to a frame where they’ve already been spread. This can be useful for example, if you want your particles to imitate snow that has fallen already, instead of displaying the first flakes falling down.
• align mode - select a mode for aligning sprite particles. Select none for no align, spin to align any spinning motion and velocity to align the velocity of the particles.