Sets the current offset of the Beam's texture cycle.

The offset of a Beams texture cycle represents the progress of the Beams texture animation. Hence, a Beam's texture cycle can be reset as follows:

beam:SetTextureOffset(0)

Where manual control is not required over the Beam's texture cycle, Beam/TextureSpeed can be used instead to animate the Beam. Although, for illustrative purposes, a similar function can be achieved with SetTextureOffset.

local RunService = game:GetService("RunService")
while true do
	for i = 1, 0, -0.01 do
		RunService.RenderStepped:Wait()
		beam:SetTextureOffset(i)
	end	
end

Notes

• The given offset parameter is expected to be a value between 0 and 1, but greater values can still be used
• The texture cycle wraps at 0 and 1, meaning the texture is in the same position when the offset is 0 or at 1
• If the Beam/Texture property is not set, this function will do nothing
• Increasing the offset will act in the inverse direction to the Beam/TextureSpeed property. Meaning, it will move the texture in the opposite direction to the direction the texture animates when Beam/TextureSpeed is more than 0