Basics Place a light source – Select a plane, press the key L and click left mouse button. You can change its properties (F4). – In UDK, no reflection rays will be computed. You need to model yourselves if you need them – In UDK, no environment lighting. If you need it, you need to model it yourselves. After the light sources are set, click “Build lighting” You can change the lightmap resolution for a plane. – Select the plane and press F4 for changing the lightmap resolution.
Suggestions Minimize the number of dynamic shadows Disable shadow property if the light not cast shadows: CastShadows = false If objects not be cast shadows, disable CastShadows. Avoid casting black shadows by using lights with low intensity Ask yourselves where the lights coming from? Make sure lightmap resolution is sufficiently high Avoid placing static meshes too close to light sources Use as few light sources as possible. Use light environment