Autodesk 12812-051462-9011 User Guide 3 - Page 153

Extended Parameters Rollout (Standard Material) Material Editor > Standard material > Extended Parameters rollout The Extended Parameters rollout is the same for all shading types of Standard material. It has controls related to transparency and reflection, as well as options for Wire mode. This topic contains tables of the Index of Refraction for some common physical materials. These can be used to create Standard materials with realistic transparency. Additive Opacity and the Alpha Channel By default, additive opacity does not generate an alpha value. In other words, the alpha value is zero, indicating no transparency. This gives correct results with backgrounds in renderings, but if you want to composite objects with additive opacity using video post on page 6773 or a different compositing program, you might want to have additive opacity render with transparency. To do so, add the following line to the [Renderer] section of the 3dsmax.ini file, and then restart 3ds Max: AlphaOutOnAdditive=1 To revert to the default method of rendering additive opacity, in the 3dsmax.ini file, change the value of AlphaOutOnAdditive back to 0 (zero), and then restart 3ds Max. Interface Advanced Transparency group These controls affect the opacity falloff on page 8068 of a transparent material. NOTE For the Translucent shader on page 5434, these controls do not appear. They are replaced by the Translucency controls on page 5447 on the Basic Parameters rollout. Falloff Chooses whether falloff is in or out, and how great it is. ■ In Increases transparency toward the inside of the object, as in a glass bottle. ■ Out Increases transparency toward the outside of the object, as in a cloud of smoke. 5408 | Chapter 19 Material Editor, Materials, and Maps