> Learn about solid particle system management in Babylon.js.

Source: https://doc.babylonjs.com/features/featuresDeepDive/particles/solid_particle_system/manage_sps

# Managing the SPS

Once built, the SPS mesh has all the properties and methods that you can apply to any mesh. In addition, there are useful properties you can use with the SPS. You should already have seen some of them.

Property | Type | Use 
-----|-----|----- 
SPS.particles | particle[] | iterate over this array in *initParticles()*
SPS.nbParticles | number | total number of particles in the SPS
SPS.billboard | Boolean | turns particles towards camera; false by default
SPS.counter | number | for your own usage; it's not set by the SPS

When working with JavaScript you can add your own properties like _capacity_ or _rate_ if needed.

When you no longer need your SPS, you can dispose of it to free memory with
```javascript
SPS.dispose();
SPS = null; // tells the GC the reference can be cleaned up also
```

When you are not going to use some particle features, you can set other SPS properties to *false* to disable them. You can always enable them again with *true*. This improves scene performance because no attempt will be made to update these properties.

Property | Type | Default | Use 
----- | ----- | ----- | -----
SPS.computeParticleRotation | Boolean | true | allows or prevents computing particle.rotation
SPS.computeParticleTexture | Boolean | true | allows or prevents computing particle.uvs
SPS.computeParticleColor | Boolean | true | allows or prevents from computing particle.color
SPS.computeParticleVertex | Boolean | false | allows or prevents calling the custom updateParticleVertex() function

These properties affect only the *SPS.setParticles()* process. You can change them between calls to *SPS.setParticles()*. For example, setting *SPS.computeParticleColor* to false after the first call to *SPS.setParticles()* allows particle colors set during *initParticles()* to be applied, but prevents any later color updates in subsequent calls to *SPS.setParticles()*. When *SPS.setParticles()* is inside the render loop, this can be very beneficial.

Tetra fountain color and texture not updated: [Playground: Tetrahedron Fountain Color And Texture Not Updated](https://playground.babylonjs.com/#GLZ1PX#10) - Simple example of creating a particle fountain where color and textures are not updated.