The fixed time step system steps forward at a pre-defined amount each step, and is not linked to the visual frame updates. The variable time step system operates on the repeated process of drawing a frame to the screen, and running your app or game code once per frame. Unity has two systems which track time, one with a variable amount of time between each step, and one with a fixed amount of time between each step. Time.maximumDeltaTime sets an upper limit on the amount of time the engine will report as having passed by the “delta time” properties above.More info See in Glossary loop (used for physics, and if you want to write deterministic time-based code). Time.fixedDeltaTime controls the interval of Unity’s fixed timestep A customizable framerate-independent interval that dictates when physics calculations and FixedUpdate() events are performed.You can read this value, or set it to control how fast time passes, allowing you to create slow-motion effects. Time.timeScale controls the rate at which time elapses.The Time class also provides you with properties which allow you to control and limit how time elapses, for example: More info See in Glossary (FPS) rate at which your game or app is running. This value varies depending on the frames per second The frequency at which consecutive frames are displayed in a running game. ltaTime returns the amount of time in seconds that elapsed since the last frame completed.Time.time returns the amount of time in seconds since your project started playing.

The Time class has a few properties which provide you with numeric values that allow you to measure time elapsing while your game or app is running. You can read individual descriptions for each member of the time class on the Time script reference page. This page contains explanations for some more commonly used members of the Time class, and how they relate to each other. Unity’s Time class provides important basic properties that allow you to work with time-related values in your project.

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