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