Autodesk 12812-051462-9011 User Guide 3 - Page 1359

TIP In some cases you might want to apply different Lens Effects settings to different pieces of geometry or IDs. To accomplish this, add additional Lens Effects entries to the Lens Effects Parameters list. Then set each different Lens Effect entry to affect a different Material ID or Object ID and proceed. Unclamp An unclamped color is brighter than pure white (255,255,255). The software keeps track of these "hot" areas which tend to show up when your scene contains bright metallic highlights or explosions. This spinner lets you determine the lowest pixel value that the Lens Effect is applied to. Pure white has a pixel value of 1. When this spinner is set to 1, any pixels with a value above 255 will be glowed. You can invert this value by clicking the I button to the right of the spinner. Surf Norm Applies the Lens Effect to part of an object, based on the angle of the surface normal to the camera. A value of 0 is coplanar, or parallel to the screen. A value of 90 is normal, or perpendicular to the screen. If you set Surf Norm to 45, only surfaces with normal angles greater than 45 degrees will be glowed. You can invert this value by clicking the I button to the right of the spinner. Whole Applies the Lens Effect to the whole scene, not just a particular piece of geometry. This, in effect, makes each pixel in the scene a potential Lens Effect source. The areas of the scene that have the Lens Effect applied to them are determined by the settings in the Image Filters group box. Alpha Applies the Lens Effect to the alpha channel of an image. The transparency of an alpha channel is interpreted opposite that of the Mask channel. Range=0 to 255. Z Hi/Z Lo Highlights objects based on their distance (Z-Buffer distance) from the camera. The Hi value is the maximum distance and the Lo value is the minimum. Any objects between these two Z-Buffer distances will be highlighted. Image Filters group Filters the Image Sources selections to let you control how the Lens Effect is applied. For example, you can have ten spheres in your scene, each with the same Object ID, but different colors. If you set the Image Source as the Object ID of the spheres, which selects all of the spheres, these will be the only objects in the scene that Lens Effects will apply an effect to. However, now that Lens Effects knows where the pixels are that effects can be applied, it needs to know which ones to actually apply the effect to. Lens 6614 | Chapter 21 Effects and Environments