// Copy from
 public void CopyFrom(RFParticleCollisionDust source)
 {
     collidesWith = source.collidesWith;
     quality      = source.quality;
     radiusScale  = source.radiusScale;
 }
 // Constructor
 public RFParticleCollisionDust()
 {
     collidesWith = RFParticles.RFParticleCollisionWithType.Everything;
     quality      = ParticleSystemCollisionQuality.High;
     radiusScale  = 1f;
 }