Type Alias ParticleBillboardMode

ParticleBillboardMode: "spherical" | "cylindrical" | "horizontal"

How each particle's quad faces the camera

'spherical': faces the camera fully, the classic billboard
'cylindrical': turns about world Y only, so the quad stays upright; suits fire, smoke columns and grass cards
'horizontal': doesn't face the camera; the quad lies flat on the world's XZ (ground) plane. Suits impact rings, blob shadows and scorch marks

Not the same as BillboardMode, which turns a whole Mesh3D about its origin.

Example

const fire = new ParticleSystem3D({ billboard: 'cylindrical' });
const ripples = new ParticleSystem3D({ billboard: 'horizontal' });