![]() Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about Peachpit products and services that can be purchased through this site. Another example is the dapples of light that appear on floors or ceilings when light glints off a crystal vase or a gold-plated statue. A good example is the random pattern often seen at the bottom of a swimming pool when bright sunlight shines through the water. You'll use radiosity and learn more about its settings in Chapter 8, "3D Product Shots."Ĭaustics are created when light is reflected off a surface or through a refracted surface. You can use ambient light to brighten areas not directly lit by lights. Ambient light is often considered a poor man's radiosity. The light hits the surfaces of the objects and bounces, lighting up the rest of the room, in turn creating a realistic image. A single light coming through a window, for example, can light up an entire room. In simpler terms, radiosity is bounced light. This also includes the color within all surfaces. It is the rate at which light energy leaves a surface. Radiosity is a rendering solution that calculates the diffused reflections of lights in a scene. You need to activate them to see their effects on a scene, but be warned-rendering times will increase. The radiosity and caustics features are not active by default. These two features in LightWave enable you to take your 3D creations even further by adding more real-world lighting properties. Radiosity and CausticsĪlso within the Global Illumination panel (within the Render Globals panel) are the Enable Radiosity and Enable Caustics settings. Similarly, if you have lens flares applied to these lights, you can globally change the Flare Intensity setting for lights, just below the Intensity setting. Instead of setting the light intensity 29 times for each light, which you could do through the Scene Editor, it is better to ramp down the Global Light Intensity setting. At the end of the song, you want all the lights to fade out equally. All their intensities are randomly and quickly changing to the beat of the music, and perhaps focusing on key performers. You have 29 spotlights shining on the stage, the players, and the actors. Let's say you're animating a stage play or musical concert, for example. This can be useful for scenes that have multiple lights that need to become brighter or dimmer over time. Because it's in the Render Globals panel, it globally changes the intensity on all lights in your scene. ![]() At the bottom of the panel is a (light) Intensity value, currently set at 100%. In the Global Illumination panel, click the Render tab at the bottom of the panel. Figure 4.8 The Global Illumination control tab, found in the Render Globals panel, governs such properties as global light intensity, global lens flare intensity, radiosity, and caustics.
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