The rendering mode for particle systems (Shuriken).
This is used by the ParticleSystemRenderer to determine how to render the particles.
| Billboard | Render particles as billboards facing the player. (Default) |
| Stretch | Stretch particles in the direction of motion. |
| HorizontalBillboard | Render particles as billboards always facing up along the y-Axis. |
| VerticalBillboard | Render particles as billboards always facing the player, but not pitching along the x-Axis. |
| Mesh | Render particles as meshes. |