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RiseVelocity behaves similarly to ParticleEmitter/Speed and Fire/Heat: it determines how fast the smoke particles move during their lifetime. It must be in the range [-25, 25]. Negative values will cause particles to emit in the bottom (-Y) direction of the parent BasePart.

When using a Smoke effect to create fog, set this property to 0. For large smoke effects, make the rise subtle (2 to 8). For chimneys and smokestacks, higher values are appropriate.

Code Samples

Add Smoke to All Fire

This code sample adds a Smoke object to every Fire object in the Workspace. It does this by using a recursive search.