Chapter 3: mental ray and lights available to the renderer from the extremely bright sun, much like a camera's aperture setting in the real world. This will cause your standard lights to be relatively weak in intensity, requiring Exposure Control adjustments to make them functional again. 3.2.1.2 Exercise:Mixingstandardlightsandphotometricdaylight 1. Open the scene called Ch03_standard_lights_02.max from the preceding exercise (or from the CD-ROM) and save it to your hard drive with the name Ch03_standard_lights_03.max. Right-click in the Top viewport to activate it, and in the Systems category, Object Type rollout of the Create panel, click the Daylight button. Click the Yes button when prompted to create Photographic Exposure Control. Click and drag in the center of the room until you see the compass appear; then click the Yes button again when prompted about creating a Physical Sky. Release the left mouse button and move the mouse to move the lights away from the compass and then left-click to set the position (see Figure 3.5).