RunService

Empty

RunService can be used for animation. It also allows handling real-time updates and frame-by-frame control.

Events	Details
Heartbeat	Fires every frame after the physics simulation has completed.
PostSimulation	Fires every frame after the physics simulation has completed.
PreAnimation	Fires every frame prior to the physics simulation but after rendering.
PreRender	Fires every frame prior to the frame being rendered.
PreSimulation	Fires every frame prior to the physics simulation.
RenderStepped	Fires every frame prior to the frame being rendered.
Stepped	Fires every frame prior to the physics simulation.

RunService vs wait()

Empty

local part = Instance.new("Part")
part.Size = Vector3.new(4, 4, 4)
part.Position = Vector3.new(0, 5, 0)
part.Anchored = true
part.Parent = workspace

local speed = 5 -- studs per second

spawn(function()
    while true do
        wait(0.033) -- Approximate wait time for 30 FPS (Frame per second)
        part.Position = part.Position + Vector3.new(speed * 0.033, 0, 0)
    end
end)

wait() is less precise and can vary slightly in timing, leading to less smooth animations.

RunService vs TweenService

Empty

Ideal for smooth, predictable animations.
Best for simple property transitions.
Easy to use with built-in easing styles.
TweenService leverages mechanisms similar to what RunService provides to ensure smooth animations, including the use of delta time for frame-independent interpolation of properties.

Empty

Suitable for real-time, dynamic updates.
Allows frame-by-frame control.
Versatile for various tasks beyond animations.
RenderStepped is tied to the rendering process, which occurs on the client side, it is restricted to LocalScripts.

RunService Use Case Example

Examples	Details
Custom Render Logic	3D GUIs: Create and update 3D GUI elements that must follow parts or characters in the game world.
Player-Exclusive Features	Local Game Mechanics: Implement features or mechanics that should only affect the local player, such as local-only particle effects or lighting changes.
Camera Manipulation	Dynamic Camera Control: Smoothly update the camera's position, orientation, or focus based on player actions or game events to create a more immersive experience.