In addition to the Lens Editor, the Knoll Spark Pack has a lot of interesting features. Most of these features are tucked into Lens Flare Pro, the main spark of the set.
The Multi-Tracker.
Inside the Lens Flare Pro spark, the 'Multi-Tracker' allows you to track flares to
the center of numerous luminance points, such as a particle system
or track points in shot. This makes compositing multiple lens flares
and using them with other filters to create additional effects much
easier.
Here's
an example of a basic particle effect. Use this as the luminance
source for the Multi-Tracker to track our flares. [play]
Auto-Track feature.
When the flare position is set to 'Auto-Track', the light source location of a single flare is controlled by the luminance of the input. Among other uses, Auto-Track can be used to control the size of the flare depending on the size of the luminance area being tracked.
Track
flares to the center of their luminance points. The Knoll particle system is rendering out small white circles. For every white circle, a flare is added. [play]
Obscuration layer.
An obscuration layer is a grayscale or b/w mask that describes anything blocking the light source, in order to add believability to the composite. The b/w matte is used to turn the lighting effect off when the light source enters the white area.
An example of
using an 'Obscuration Layer'. The flare is affected by the alpha
channel of the plane and reacts accordingly. [play]
