A visual shader node that forces to emit a particle from a sub-emitter. This node calls the internal [code]emit_subparticle[/code] method. It will emit a particle from the configured sub-emitter and also allows to customize how it's emitted. Requires a sub-emitter assigned to the particles node that is using this shader. Flags used to override the properties defined in the sub-emitter's process material. If enabled, the particle starts with the position defined by this node. If enabled, the particle starts with the rotation and scale defined by this node. If enabled,the particle starts with the velocity defined by this node. If enabled, the particle starts with the color defined by this node. If enabled, the particle starts with the [code]CUSTOM[/code] data defined by this node.