KNOLL LIGHT FACTORY EZ
Knoll Light Factory EZ is a set of quick setup Lens Flare tools from Industrial Light & Magic’s John Knoll. Use it to instantly add color, depth and excitement to a live-action scene or your motion graphics.
Knoll Light Factory has been used on the Star Wars films and countless others for over a decade. Knoll Light Factory EZ is found under the Universe Stylize category of effects. It is a simplified version of the Knoll Light Factory plugin found in Red Giant's Effects Suite.
- Drag the uni.Knoll Light Factory EZ effect onto your clip.
- Click the Choose a Flare button to see the presets based on real-world lenses. Double-click any preset to apply. Once a preset is selected, you will see its name selected within the preset category drop-down menu below.
- Presets can also be applied directly from preset category menus:
- Action & SciFi Lenses
- Cinematic Lenses
- Motion Graphics Lenses
- Natural Light Lenses
Modify the Flare
Location Tracking adjusts the visibility of the lens flare, including where its light source is located and if that light source is turned on.
- Location Layer: Choose a layer from the drop-down menu to use it's alpha channel to set the position of the light source. This overrides the Light Location setting. The layer need not be visible in the Timeline to be used as a positioning layer. Setting the Location Layer to None will allow Light Location to set the effect’s position.
Note: Location Layer searches the alpha channel of the selected layer for non-black pixels and calculates the average position of these pixels. If you have a small white dot in a black alpha channel, the light effect will be placed at the center of the dot. If the alpha channel contains multiple white dots, the plug-in will average the positions of each dot and place the light at the averaged location. If no non-black pixels exist in the alpha channel, the light effect will default to the center of the image.
Obscuration Layer: Choose a layer that will obscure (hide) the flare, making it appear to pass behind objects in another layer. The default setting of None causes no layer to be used.
- Obscuration Type: Your lens flare can be hidden, or 'obscured', with different image-based options. Choose one of five ways to use the data in the Obscuration Layer:
- RGB: Modulates the color of the light effect with the corresponding RGB value of the obscuration layer. It is possible to simulate the sun shining through a stained glass window by moving the light flare over the color area.
- Alpha: The default option. Pixels with an alpha value of zero or black let the flare show through. Pixels with an alpha value of white will completely obscure the flare. Pixel values between 0 and 255 scale the obscuration by a corresponding amount.
- RGB + Alpha: Combines the effects of the RGB and alpha types where transparency of the light effects is controlled by the alpha channel and the color is altered by the RGB channels just as in RGB type shown above.
- Inverse alpha: Produces the same result as the alpha choice but white and black are inverted.
- Luma: Use the source video as an obscuration layer based on it's luminance.
- TIP: The RGB color change is added to any color the light effect might have, so a yellow flare passing through a cyan-colored RGB obscuration layer will result in a green flare. RGB + alpha type combines the effects of the RGB and alpha types where transparency of the light effects is controlled by the alpha channel and the color is altered by the RGB channels just as in RGB type shown above.
- Source Size: Source Size is active when an Obscuration Layer is set. Its value defines the search area, measured in pixels, averaging around the current light source position. This search area then sets the amount of the layer that is obscured. Source Size does not change the size of the light source.
The value range is 0 to 100 pixels. At the default value of 2, the Obscuration Layer is examined in a 2-pixel radius around the light source for obscuring values (white or black). If 20% of the pixels inside that radius are obscured, the brightness of the flare will be reduced 20%.
This checkbox is off by default. When it's on, all of the black in the lens flare will become transparent. Render Alpha generates an alpha matte for the black pixels in the lens flare. This is helpful for compositing your flare against other clips in your project.