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Part XI: Advanced Lighting and Rendering
FIGURE 46.2
The Photographic Exposure Control rollout works with real-world camera settings.

Tutorial: Using the Logarithmic Exposure Control
As you start to use the new photometric lights, you may find it difficult to get the settings just right. The
results are oversaturation or undersaturation, but luckily the Logarithmic Exposure Control can quickly fix
any problems that appear.
To adjust the effect of a photometric light using the Logarithmic Exposure Control, follow these steps:
1. Open the Array of chrome spheres.max file from the Chap 46 directory on the DVD.
This file contains lots and lots of chrome mapped spheres with advanced lighting enabled.
2. Choose Rendering ➪ Render (or press the F10 key) to open the Render Scene dialog box, and
click the Render button.
It takes a while to render, but notice the results, shown on the left in Figure 46.3.
3. Choose Rendering ➪ Environment (or press the 8 key) to open the Environment & Effects dialog
box. In the Exposure Control rollout, select Logarithmic Exposure Control from the drop-down
list, and enable the Active and Process Background and Environment Maps options. Then click
the Render Preview button.
4. In the Logarithmic Exposure Control rollout, set the Brightness value to 60, set the Contrast value
to 100, and enable the Desaturate Low Levels option.
5. In the Render Scene dialog box, click the Render button again to see the updated rendering.
The image on the right in Figure 46.3 shows the rendered image with exposure control enabled.

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