Autodesk 12812-051462-9011 User Guide 3 - Page 261

map off and on. When the check box is off, the map is not computed and has no effect in the renderer. The Amount spinner determines the amount that the map affects the material, expressed as a percentage of full intensity. For example, a diffuse map at 100% is completely opaque and covers the base material. At 50%, it is semi-transparent and the base material (the diffuse, ambient, and other colors of the material without mapping) shows through. Lock button Locks the Environment map to the Transparency Environment map. When on, the Transparency Environment map controls are disabled, and a map applied to the Raytrace Environment applies to the Transparency Environment as well. When off, the Transparency Environment map controls are enabled, and the Transparency Environment can have a different map assigned to it. Default=on. Changing this button's setting here also changes it on the Basic Parameters rollout on page 5493, and the Extended Parameters rollout on page 5502. Diffusion Mapping The Diffusion map component lets you apply an additional, second texture to modify the Diffuse component. Typically, you will want to reduce the Amount of this map to allow the main Diffuse map to show through. For example, you might have a clean, bright image for a billboard. You use this image as the Diffuse map, and then use a second map as a Diffusion map to apply soot and city grime. TIP Animating the Amount can change the appearance of the material over time, letting the Diffusion map either conceal or reveal the underlying Diffuse map. NOTE Show Map In Viewport does not display the Diffusion map. Raytrace Dynamics Properties Rollout Material Editor > Type button > Material/Map Browser > Raytrace material > Dynamics Properties rollout As with a standard material, the Dynamics Properties rollout for a Raytrace material on page 5490 lets you specify surface properties that affect the animation of an object upon collision with another object. If there are no collisions in your simulation, these settings have no effect. 5516 | Chapter 19 Material Editor, Materials, and Maps