RiseVelocity

NotReplicated

This item is not replicated across Roblox’s server/client boundary.

Property of: Smoke

Value Type: float

Description:

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.

				
					Add Smoke to All Fire
				
					Expected Output
				
					Expand
					
			local function recurseForFire(object)
	-- Check if we found a Fire object that has no Smoke
	if object:IsA("Fire") and not object.Parent:FindFirstChildOfClass("Smoke") then
		-- Create a smoke effect for this fire
		local smoke = Instance.new("Smoke")
		smoke.Color = Color3.new(0, 0, 0)
		smoke.Opacity = 0.15
		smoke.RiseVelocity = 4
		smoke.Size = object.Size / 4
		smoke.Parent = object.Parent
	end
	-- Continue search for Fire objects
	for _, child in pairs(object:GetChildren()) do
		recurseForFire(child)
	end
end
recurseForFire(workspace)
		
			When run, you should see every Fire object in the workspace have a Smoke sibling object (if it did not have one before).
		
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