Page 1137 - Kitab3DsMax

Chapter 45: Working with Advanced Lighting, Light Tracing, and Radiosity
FIGURE 45.12
The Rendering Parameters and Statistics rollouts offer rendering options and statistics for radiosity solutions.

The Regather Indirect Illumination option enables a Light-Tracer-like step along with the radiosity solution
and produces an image that has the best of both solutions. The regathering options are the same as those
defined for the light tracer.
The Statistics rollout includes information about the radiosity process. Using this information, you can
judge whether the settings are too high or too low.

Tutorial: Lighting a house interior with radiosity
Radiosity works best in indoor scenes or scenes that are mostly interior. The only light source for this scene
is a Daylight system and a single Omni light in the front hallway.

To light a house interior with radiosity, follow these steps:
1. Open the House interior.max file from the Chap 45 directory on the DVD.
2. Open the Advanced Lighting panel with the Rendering ➪ Radiosity menu command (or press the
9 key). Select Radiosity from the drop-down list in the Select Advanced Lighting rollout.
3. In the Radiosity Processing Parameters rollout, set the Refine Iterations value to 2 and click the
Start button to have Max compute the radiosity solution.
4. In the Rendering Parameters rollout, enable the Render Direct Illumination, the Regather Indirect
Illumination, and the Adaptive Sampling options. Then click the Render button to begin the ren-
dering process.
Figure 45.13 shows the finished rendered house interior. Notice that all surfaces are well lit even though
the scene has a limited number of lights.

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