Opacity

NotReplicated

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

Property of: Smoke

Value Type: float

Description:

Opacity determines the opaqueness of the smoke particles. It must be in the range [0, 1]. This property works inversely in comparison to a part’s BasePart/Transparency or ParticleEmitter’s ParticleEmitter/Transparency: a value of 0 is completely invisible, 1 is completely visible. Below, the left Smoke effect has an Opacity of 0.25 (or, 25%), the center has the default 0.5 (50%), and the right has 1.0 (or 100%).

Smoke with varying opacity levels

It should be noted that the texture that Roblox uses for Smoke particles is partially transparent, so setting this property to 1 will still yield transparency in rendered smoke.

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
			
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			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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