roblox-vfx

Main source: https://create.roblox.com/docs/en-us/effects/particle-emitters + the Effects section of the docs and the ParticleEmitter class reference.

Tune particle lifetime, size, transparency, and rate together. Profile overlapping transparent effects on the lowest target device.

For marker-triggered bursts, read roblox-animation. For UI particles, read roblox-user-interfaces; ParticleEmitters do not render inside ViewportFrame.

Core creation and parenting

• Parent ParticleEmitter to a BasePart (emission fills bounds or chosen EmissionDirection face) or (strongly preferred for control) to an Attachment.
• Rotate the parent or the attachment to steer emission. EmissionDirection is ignored when parented to an Attachment; rotate the Attachment itself to aim particles.
• EmissionDirection only matters when parented to a part.

Tune particle appearance