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 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 Design:
The filter, or transmissive color, is the color transmitted through transparent or semi-transparent materials such as glass. You can use the filter color with volumetric lighting to create effects such as colored light through a stained-glass window. cast by transparent objects are tinted with the filter color.
A shadow's color is changed with a red filter color.
Sets the index of refraction (IOR) used by refraction maps and raytracing. The IOR controls how severely the material refracts transmitted light. Left at 1.0, the IOR of air, the object behind the transparent object does not distort. At 1.5 the object behind distorts greatly, like a glass marble. At an IOR slightly less than 1.0, the object reflects along its edges, like a bubble seen from under water. Default=1.5.
|Glass||1.5 (clear glass) to 1.7|
In the physical world, the IOR results from the relative speeds of light through the transparent material and the medium the eye or the camera is in. Typically this is related to the object's density; the higher the IOR, the denser the object.
You can also use a map to control the index of refraction. IOR maps always interpolate between 1.0 (the IOR of air) and the setting in the IOR parameter. For example, if the IOR is set to 3.55 and you use a black-and-white Noise map to control IOR, the IORs rendered on the object will be set to values between 1.0 and 3.55; the object will appear denser than air. If, on the other hand, your IOR is set to 0.5, then the same map values will render between 0.5 and 1.0, as if the camera were under water and the object was less dense than the water.
|Carbon Dioxide, Liquid||1.200|
|Sugar Solution 30%||1.380|
|Sugar Solution 80%||1.490|
|Glass, Zinc Crown||1.517|
|Sodium Chloride (Salt) 1||1.544|
|Glass, Light Flint||1.575|
|Sodium Chloride (Salt) 2||1.644|
|Glass, Heavy Flint||1.650|
|Glass, Heaviest Flint||1.890|
Below: 0.0 (100% dimming)
Affects the intensity of the reflection that is not in shadow. The Reflection Level value multiplies the illumination level of the lit area of the reflection, to compensate for dimming. In most cases, the default value of 3.0 keeps the reflection in the lit area at about the same level it would appear if reflection dimming were not on.