Světlo
*AmbientLight
*DirectionalLight
*PointLight
*SpotLight
All scenes must contain at least one light source, otherwise none of the objects will be visible. (Strictly speaking, lights are just part of the model. However, they deserve special consideration because you need them to be able to see anything.)

The AmbientLight type illuminates all objects uniformly. It does not vary illumination according to position or angle. This provides an easy way of making sure everything is visible, but tends to provide a very ‘flat’ look. There is nothing in nature corresponding directly to ambient light – all light comes from some light source either directly or indirectly.

DirectionalLight simulates a strong light source a long distance away, such as sunlight. Parts of an object facing the light will be more brightly illuminated than those facing away from the light. This light source takes into account the orientation of objects, but not their location.

PointLight simulates a nearby light source, such as a light bulb in a room. SpotLight is similar, except it does not radiate in all directions – it projects a cone of light.

One of the nice things about the fact that lights are essentially a part of the model is that you can move them around – you can animate light sources just like you can animate anything else.