Random Between Two Colors: The starting particle color is chosen as a random linear interpolation between the two given colors.Gradient: Particles are emitted with a start color specified by a gradient, with the gradient representing the lifetime of the Particle System.Color: The particle start color is fixed throughout the system’s lifetime.Similarly, the Start Color property in the main module has the following options: Random Between Two Curves: Two curves define the upper and lower bounds of the the value at a given point in its lifetime the current value varies randomly between those bounds.Random Between Two Constants: Two constant values define the upper and lower bounds for the value the actual value varies randomly over time between those bounds.Curve: The value is specified by a curve/graph.Constant: The property’s value is fixed throughout its lifetime.Unity provides several different methods of specifying how this variation happens: Many of the numeric properties of particles or even the whole Particle System can vary over time. The buttons at the top of the panel can be used to pause and resume the simulation, or to stop it and reset to the initial state. The playback time can be moved backwards and forwards by clicking on the Playback Time label and dragging the mouse left and right.
The Particle Count indicates how many particles are currently in the system. The Playback Time indicates the time elapsed since the system was started this may be faster or slower than real time depending on the playback speed. The Playback Speed allows you to speed up or slow down the particle simulation, so you can quickly see how it looks at an advanced state.
When a GameObject with a Particle System is selected, the Scene view contains a small Particle Effect panel, with some simple controls that are useful for visualising changes you make to the system’s settings. See documentation on the Particle System component and individual Particle System modules to learn more. Additionally, you can edit one or more systems at the same time using a separate Editor window accessed via the Open Window button in the Inspector. Because the component is quite complicated, the Inspector is divided into a number of collapsible sub-sections or modules that each contain a group of related properties. Unity implements Particle Systems with a component, so placing a Particle System in a Scene is a matter of adding a pre-made GameObject (menu: GameObject > Effects > Particle System) or adding the component to an existing GameObject (menu: Component > Effects > Particle System).
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