In an abstract game world, they can be a useful way to add convincing shading to objects without exactly specifying where the light is coming from. In a realistic scene, they can be used to simulate the sun or moon. The distance of the light from the target object isn’t defined and so the light doesn’t diminish.ĭirectional lights represent large, distant sources that come from a position outside the range of the game world. All objects in the scene are illuminated as if the light is always from the same direction.
A Directional Light doesn’t have any identifiable source position and so the light object can be placed anywhere in the scene. Behaving in many ways like the sun, directional lights can be thought of as distant light sources which exist infinitely far away. Effect of a Spot Light in the scene Directional Lightsĭirectional Lights are useful for creating effects such as sunlight in your scenes. With the direction controlled from a script or animation, a moving spot light will illuminate just a small area of the scene and create dramatic lighting effects. Spot lights are generally used for artificial light sources such as flashlights, car headlights and searchlights. Widening the angle increases the width of the cone and with it increases the size of this fade, known as the ‘penumbra’. Light also diminishes at the edges of a Spot Light’s cone. The center of the cone points in the forward (Z) direction of the light object. However, a Spot Light is constrained to an angle, resulting in a cone-shaped region of illumination. Like a Point Light, a Spot Light has a specified location and range over which the light falls off. Effect of a Point Light in the scene Spot Lights You can also use them to make a spark or explosion illuminate its surroundings in a convincing way. In each Scene, you place your environments, obstacles, and decorations, essentially designing and building your game in pieces. Think of each unique Scene file as a unique level. Point lights are useful for simulating lamps and other local sources of light in a scene A Scene contains the environments and menus of your game.
This is known as ‘inverse square law’ and is similar to how light behaves in the real world. Light intensity is inversely proportional to the square of the distance from the source. The intensity diminishes with distance from the light, reaching zero at a specified range. The direction of light hitting a surface is the line from the point of contact back to the center of the light object. Area Light, a Light that’s defined by a rectangle or disc in the Scene, and emits light in all directions uniformly across its surface area but only from one side of the rectangle or discĪ Point Light is located at a point in space and sends light out in all directions equally.Directional Light, a Light that’s located infinitely far away and emits light in one direction only.Spot Light, a Light that’s located at a point in the Scene and emits light in a cone shape.Point Light, a Light that’s located at a point in the Scene and emits light in all directions equally.You can use the Type property to choose how the Light behaves. This page describes the effects of the Type property on a Light component.
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