Vì vậy, việc tạo ra một mảng các đối tượng liên quan đến một số bản sao nhân bản của một đối tượng trong một mô hình, chẳng hạn như trong các hàng và cột trong một vòng tròn. Tôi chắc chắn rằng bạn có một khái niệm cho rằng đối tượng hoàn hảo trong túi nhỏ của bạn các thủ thuật, và chương này cho phép bạn sao chép nó và sau khi bạn nhận được nó. | Part IV Materials Cameras and Lighting Basics FIGURE Several frames of an animation showing a tree scene from sunrise to sunset Using Volume Lights When light shines through fog smoke or dust the beam of the light becomes visible. The effect is known as a Volume Light. To add a Volume Light to a scene choose Rendering o Environment or press the 8 key to open the Environment dialog box. Then click the Add button in the Atmosphere rollout to open the Add Atmospheric Effect dialog box and select Volume Light. The parameters for the volume light are presented in the Volume Light Parameters rollout. You can also access the Volume Light effect from the Atmospheres and Effects rollout in the Modify panel when a light is selected. r. rj r r- r- r. rr Chapter 45 Using Atmospheric and Render Effects covers the other atmospheric effects. IcrOss-r-ef Volume light parameters At the top of the Volume Light Parameters rollout shown in Figure is a Pick Light button which enables you to select a light to apply the effect to. You can select several lights which then appear in a dropdown list. You can remove lights from this list with the Remove Light button. 500 Using Lights and Basic Lighting Techniques 19 FIGURE The Volume Light Parameters rollout in the Environment dialog box lets you choose which lights to include in the effect. In the Volume section the Fog Color swatch lets you select a color for the fog that is seen within the light. This color is combined with the color of the light. The Attenuation Color is the color the fog appears to have at a distance far from the light source. This color also combines with the Fog Color and is best set to a dark color. The Density value determines the thickness of the fog. The Exponential option causes the density to increase exponentially with the distance. The Max and Min Light Percentage values determine the amount of glow that the volume light causes and the Attenuation Multiplier controls the strength of the .
