[Home](./index.md) > [server](./server.md) > [ParticleEmitterOptions](./server.particleemitteroptions.md) ## ParticleEmitterOptions interface Options for creating a ParticleEmitter instance. Use for: configuring an emitter before calling `ParticleEmitter.spawn`. Do NOT use for: runtime updates after spawn; use `ParticleEmitter.set*` methods. \*\*Category:\*\* Particles **Signature:** ```typescript export interface ParticleEmitterOptions ``` ## Properties

Property	Modifiers	Type	Description
[alphaTest?](./server.particleemitteroptions.alphatest.md)		number	_(Optional)_ The alpha test value, discards particle texture pixels with alpha opacity less than this value. Defaults to 0.5.
[attachedToEntity?](./server.particleemitteroptions.attachedtoentity.md)		[Entity](./server.entity.md)	_(Optional)_ If set, the ParticleEmitter will be attached to this entity.
[attachedToEntityNodeName?](./server.particleemitteroptions.attachedtoentitynodename.md)		string	_(Optional)_ The name of the node of the attached entity (if the attached entity is a model entity) to attach the particle emitter to.
[colorEnd?](./server.particleemitteroptions.colorend.md)		[RgbColor](./server.rgbcolor.md)	_(Optional)_ The color of an emitted particle at the end of its lifetime.
[colorEndVariance?](./server.particleemitteroptions.colorendvariance.md)		[RgbColor](./server.rgbcolor.md)	_(Optional)_ The color variance of an emitted particle at the end of its lifetime.
[colorIntensityEnd?](./server.particleemitteroptions.colorintensityend.md)		number	_(Optional)_ The color intensity of an emitted particle at the end of its lifetime. Values greater than 1 create HDR/bloom effects.
[colorIntensityEndVariance?](./server.particleemitteroptions.colorintensityendvariance.md)		number	_(Optional)_ The color intensity variance of an emitted particle at the end of its lifetime.
[colorIntensityStart?](./server.particleemitteroptions.colorintensitystart.md)		number	_(Optional)_ The color intensity of an emitted particle at the start of its lifetime. Values greater than 1 create HDR/bloom effects.
[colorIntensityStartVariance?](./server.particleemitteroptions.colorintensitystartvariance.md)		number	_(Optional)_ The color intensity variance of an emitted particle at the start of its lifetime.
[colorStart?](./server.particleemitteroptions.colorstart.md)		[RgbColor](./server.rgbcolor.md)	_(Optional)_ The color of an emitted particle at the start of its lifetime.
[colorStartVariance?](./server.particleemitteroptions.colorstartvariance.md)		[RgbColor](./server.rgbcolor.md)	_(Optional)_ The color variance of an emitted particle at the start of its lifetime.
[gravity?](./server.particleemitteroptions.gravity.md)		[Vector3Like](./server.vector3like.md)	_(Optional)_ The gravity vector for an emitted particle.
[lifetime?](./server.particleemitteroptions.lifetime.md)		number	_(Optional)_ The lifetime of an emitted particle in seconds.
[lifetimeVariance?](./server.particleemitteroptions.lifetimevariance.md)		number	_(Optional)_ The lifetime variance of an emitted particle in seconds.
[lockToEmitter?](./server.particleemitteroptions.locktoemitter.md)		boolean	_(Optional)_ When enabled, emitted particles follow the emitter's world position. Cannot be changed after construction.
[maxParticles?](./server.particleemitteroptions.maxparticles.md)		number	_(Optional)_ The maximum number of live particles.
[offset?](./server.particleemitteroptions.offset.md)		[Vector3Like](./server.vector3like.md)	_(Optional)_ The offset of the particle emitter from the attached entity or position.
[opacityEnd?](./server.particleemitteroptions.opacityend.md)		number	_(Optional)_ The opacity of an emitted particle at the end of its lifetime.
[opacityEndVariance?](./server.particleemitteroptions.opacityendvariance.md)		number	_(Optional)_ The opacity variance of an emitted particle at the end of its lifetime.
[opacityStart?](./server.particleemitteroptions.opacitystart.md)		number	_(Optional)_ The opacity of an emitted particle at the start of its lifetime.
[opacityStartVariance?](./server.particleemitteroptions.opacitystartvariance.md)		number	_(Optional)_ The opacity variance of an emitted particle at the start of its lifetime.
[orientation?](./server.particleemitteroptions.orientation.md)		[ParticleEmitterOrientation](./server.particleemitterorientation.md)	_(Optional)_ 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'.
[orientationFixedRotation?](./server.particleemitteroptions.orientationfixedrotation.md)		[Vector3Like](./server.vector3like.md)	_(Optional)_ The fixed rotation of emitted particles in degrees (x, y, z) when orientation is 'fixed'. Defaults to (0, 0, 0).
[position?](./server.particleemitteroptions.position.md)		[Vector3Like](./server.vector3like.md)	_(Optional)_ The position of the particle emitter in the world if explicitly set.
[positionVariance?](./server.particleemitteroptions.positionvariance.md)		[Vector3Like](./server.vector3like.md)	_(Optional)_ The position variance of an emitted particle.
[rate?](./server.particleemitteroptions.rate.md)		number	_(Optional)_ The rate per second at which particles are emitted.
[rateVariance?](./server.particleemitteroptions.ratevariance.md)		number	_(Optional)_ The rate per second variance of the particle emission rate.
[sizeEnd?](./server.particleemitteroptions.sizeend.md)		number	_(Optional)_ The size at the end of an emitted particle's lifetime.
[sizeEndVariance?](./server.particleemitteroptions.sizeendvariance.md)		number	_(Optional)_ The size variance at the end of an emitted particle's lifetime.
[sizeStart?](./server.particleemitteroptions.sizestart.md)		number	_(Optional)_ The size at the start of an emitted particle's lifetime.
[sizeStartVariance?](./server.particleemitteroptions.sizestartvariance.md)		number	_(Optional)_ The size variance at the start of an emitted particle's lifetime.
[textureUri](./server.particleemitteroptions.textureuri.md)		string	The URI or path to the texture to be used for the particles.
[transparent?](./server.particleemitteroptions.transparent.md)		boolean	_(Optional)_ Whether an emitted particle is transparent, resulting in smoother transparency blending.
[velocity?](./server.particleemitteroptions.velocity.md)		[Vector3Like](./server.vector3like.md)	_(Optional)_ The velocity of an emitted particle.
[velocityVariance?](./server.particleemitteroptions.velocityvariance.md)		[Vector3Like](./server.vector3like.md)	_(Optional)_ The velocity variance of an emitted particle.