Lights

1. Directional

Directional lights can be thought of as distant light sources which exist infinitely far away. A directional light does not have any identifiable source position and so the light object can be placed anywhere. All objects in the scene is illuminated as if the light is always from the same direction. The distance of the light from the target object is not defined and so the light does not diminish.

2. Spot

Like a point light, a spot light has a specified location and range over which the light falls off. However, the spot light is constrained to an angle, resulting in a cone-shaped region of illumination. The center of the cone points in the forward (Z) direction of the light object. Light also diminishes at the edges of the spot light’s cone. Widening the angle increases the width of the cone and with it increases the size of this fade, known as the ‘penumbra’.

3. Point

A point light is located at a point in space and sends light out in all directions equally. The direction of light hitting a surface is the line from the point of contact back to the center of the light object. The intensity diminishes with distance from the light, reaching zero at a specified range. Light intensity is inversely proportional to the square of the distance from the source. This is known as ‘inverse square law’ and is similar to how light behaves in the real world.

4. DecorLight

Different types of lights: