Autodesk 12812-051462-9011 User Guide 3 - Page 625

■ Click the buttons marked None to assign maps. ■ Turn on the check boxes to activate the maps; otherwise the colors are used. These are on by default. ■ Click Swap Colors/Maps (the curved arrow) to exchange the assignments. Falloff Type Chooses the kind of falloff. Five options are available: ■ Perpendicular/Parallel Sets the angular falloff ranges between face normals that are perpendicular to the falloff direction and normals that are parallel to the falloff direction. The falloff range is based on a 90-degree change in face normal direction. (Default.) ■ Towards/Away Sets the angular falloff ranges between face normals that face toward (parallel to) the falloff direction and normals that face away from the falloff direction. The falloff range is based on a 180-degree change in face normal direction. ■ Fresnel Based on adjustments to the Index of Refraction (IOR). Results in dim reflections on surfaces facing the view, with much brighter reflections on angled faces, creating highlights like those on the sides of a glass. ■ Shadow/Light Adjusts between two subtextures based on how much light is falling on the object. ■ Distance Blend Adjusts between two subtextures based on Near Distance and Far Distance values. Uses include reducing aliasing on large terrain objects and controlling the shading in non-photorealistic environments. Falloff Direction Chooses the direction of falloff. Five options are available: ■ Viewing Direction (Camera Z-Axis) Sets the falloff direction relative to the camera (or screen). Changing object orientation doesn't affect the falloff map. (Default.) ■ Camera X/Y Axis Similar to Camera Z-Axis. For example, using Camera X-Axis with the Toward/Away falloff type runs the gradient from left (Toward) to right (Away). ■ Object Uses an object whose position determines the falloff direction. Click the wide button next to Object in the Mode Specific Parameters group, and then pick an object in the scene. The falloff direction is the direction from the point being shaded toward the object's center. Points 5880 | Chapter 19 Material Editor, Materials, and Maps