[Home](./index.md) > [server](./server.md) > [ParticleEmitterOptions](./server.particleemitteroptions.md) > [orientation](./server.particleemitteroptions.orientation.md) ## ParticleEmitterOptions.orientation property The orientation mode of emitted particles. 'billboard' faces the camera, 'billboardY' faces the camera but keeps Y-axis upward, 'fixed' uses a fixed rotation. Defaults to 'billboard'. **Signature:** ```typescript orientation?: ParticleEmitterOrientation; ```