The emission shape (Shuriken).
This is used by the ShapeModule to determine how to sort the particles.
| Sphere | Emit from a sphere. | 
| Hemisphere | Emit from a half-sphere. | 
| Cone | Emit from the base of a cone. | 
| Box | Emit from the volume of a box. | 
| Mesh | Emit from a mesh. | 
| ConeVolume | Emit from a cone. | 
| Circle | Emit from a circle. | 
| SingleSidedEdge | Emit from an edge. | 
| MeshRenderer | Emit from a mesh renderer. | 
| SkinnedMeshRenderer | Emit from a skinned mesh renderer. | 
| BoxShell | Emit from the surface of a box. | 
| BoxEdge | Emit from the edges of a box. | 
| Donut | Emit from a Donut. |