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.

This skill exists because surface-level "add a ParticleEmitter and tweak Rate and Size" implementations look bad, perform terribly, or both. Real effects require understanding sequences, shapes, flipbooks, lighting interaction, and strict performance discipline.

See roblox-animation for driving emitters from markers, roblox-user-interfaces for UI-based particle illusion techniques (real ParticleEmitters do not render inside ViewportFrame), and roblox-vfx references/ for property-by-property deep dives.

Core Creation & 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.

The Visual Control Stack (in rough order of impact)