Autodesk 62205-051408-9001 User Guide - Page 749
Displaying Light in a Composite, Using Ambient Light
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Displaying Light in a Composite ❚❘❘ Displaying Light in a Composite To view the lighting, enable the Render Effects options. They control the rendering of the lighting and surface effects in the composite. When you move a light or change its properties, Combustion renders the image and displays the result in the viewports. Note: If you cannot see the lighting in a composite, make sure the Shading option is enabled. When you create a 3D composite, these options are disabled by default. Disable the Render Effects options to improve display performance when you are not working on lighting effects. The Render Effects options also determine which lighting and surface effects are rendered when you render a composite. For information, see Chapter 31, "Rendering''. Note: For information on working with surface effects, see Chapter 8, "Using Surface Properties''. To display the light in a composite: 1. Select the composite whose lighting you want to view. 2. In the Composite Controls panel, click Settings to show the Settings controls. 3. Enable the required Render Effects options. Enable To Shading Turn on lights in the composite. Shadows View shadows cast by objects onto other objects in the composite. Reflections View reflections and highlights on surfaces created by light bouncing from one object to another. If the composite is the current operator in the viewport, the lighting and surface effects appear. Using Ambient Light You can use ambient light to "wash out" or completely darken the composite. Before adding source lights to a composite, you should adjust the color and intensity of the ambient light. However, you can change these settings at any time. You can also animate the ambient light properties to create realistic lighting effects by adding keyframes or by creating expressions. For information on animating using keyframes or expressions, see Chapter 12, "Creating Animations'' and Chapter 13, "Creating Expressions''. Adjusting the Ambient Light When you create a 3D composite, the ambient light color is set to white (RGB = 100%, 100%, 100%) by default. Change the color of ambient light to give an overall "tint" to the composite. Intensity affects the overall illumination of the composite. A high intensity causes the objects to appear washed out. An intensity of 0% means that no ambient light is added to the composite, and unless other light sources are added, the composite is black. You can change the ambient light settings using the Light controls or the Timeline. To change the ambient light in the Light controls: 1. Select the composite and then select a light. For information, see Selecting Lights. 2. In the Composite Controls panel, click Light. The Light controls appear. 733
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