Autodesk 12812-051462-9011 User Guide 3 - Page 1382
Perimeter Alpha, Perimeter, Bright, Apply
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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 Effects uses the filter controls to find out which source pixels to apply the effect to. All Selects all source pixels in the scene and applies the Lens Effect to them. Edge Selects all source pixels along a boundary edge and applies the Lens Effect to them. Applying a Lens Effect along the edges of objects produces a soft halo that exists on both inside and outside edges of your object. Perim(eter) Alpha Applies the Lens Effect only to the perimeter of an object based on its alpha channel. Selecting this option applies the effect only on the outside of an object without any spill on the interior. Whereas filtering by Edge produces a spill onto the object, Perimeter Alpha keeps all of the edges clean because it relies on the scene alpha channel to derive its effect. Perim(eter) Applies the Lens Effect only to the perimeter of an object based on Edge interference. Although not as precise as Perimeter Alpha, you might need to use the Perimeter option at times when the alpha channel is unavailable. Bright Filters the source objects based on their brightness values. The effect is only applied to objects with a brightness above the spinner setting This option can be inverted by clicking the I button next to the spinner Hue Filters the source objects by their hue. Select the hue by clicking the color swatch next to the spinner. You can choose hue values from 0 to 255. The spinner beside the Hue color swatch lets you enter a variance level so that the glow can find several different hues in the same range as the chosen color Additional Effects group Additional Effects allows you to apply maps such as Noise to your Lens Effect. You can display the Material/Map browser by clicking the long button next to the Apply check box. Apply Applies the selected map when activated. Lens Effects Rendering Effects | 6637