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■ Timeline, then add Timeline FX from the Effects ribbon (see Adding Timeline FX (page 373)).
■ The Modular Keyer, then select a node from the Node bin.
NOTE In ConnectFX and the Modular Keyer, the Matchbox node's input tab colours are based on the type of
input (for example, yellow for composite, blue for matte). For some Matchbox shaders, you may need to connect
all inputs before you can see a result.
When selecting a Matchbox shader from the file browser, you can use the File Format box to display shaders
in .glsl format or encrypted Matchbox .mx format. Some more efficient, complex, or sophisticated effects
can be split into multiple passes. Make sure to select the parent .glsl shader from the browser if you want to
load a multipass Matchbox shader (the .mx format packages all passes into one file).
Using Matchbox as a Transition
You can use Matchbox shaders as transitions in the Timeline. You can create your own Matchbox transitions
or use one of the many transition presets, supplied with the application.
To use Matchbox as a transition:
1 Add a Matchbox transition.
The file browser opens at the location containing the shaders and transition presets.
2 Select a transition preset.
The shader is loaded as a transition and you are taken back to the Timeline. However, the shader does
not yet behave as a transition.
Though the selected shader is marked "transition", it does not contain any of the animation or the
parameter values that makes it behave as a transition. In order to get the transition effect, you can
either manually create the transition animation or select one of the preset transition effects, from the
Preset pop-up menu of the Quick menu, after having loaded the shader. This loads the animation data
and parameter values necessary for a proper transition effect.
3 Select a preset transition from the Preset pop-up menu of the Quick menu.
The shader now behaves as a transition.
4 Make any timing adjustments to your transition.
NOTE To create your own transition effect from a shader, you must manually keyframe your animation and set
your shader parameter values and save them to a setup. An added benefit of working this way is that the setup
contains the shader. This means that you can reload and use the effect even if the shader is not present on the
workstation you're working on.
996 | Chapter 22 Using Shaders to Create Your Own Effects