[Home](./index.md) > [server](./server.md) > [ParticleEmitter](./server.particleemitter.md) > [opacityEnd](./server.particleemitter.opacityend.md) ## ParticleEmitter.opacityEnd property The opacity of an emitted particle at the end of its lifetime. **Signature:** ```typescript get opacityEnd(): number | undefined; ```