|Microsoft DirectX 9.0|
Lights are used to illuminate objects in a scene. When lighting is enabled, Microsoft?Direct3D?calculates the color of each object vertex based on a combination of:
When you use Direct3D lighting and materials, you allow Direct3D to handle the details of illumination for you. Advanced users can perform lighting on their own, if desired.
How you work with lighting and materials makes a big difference in the appearance of the rendered scene. Materials define how light reflects off a surface. Direct light and ambient light levels define the light that is reflected. You must use materials to render a scene if lighting is enabled. Lights are not required to render a scene, but details in a scene rendered without light are not visible. At best, rendering an unlit scene results in a silhouette of the objects in the scene. This is not enough detail for most purposes.
Additional information is contained in the following topics.