The Keyer’s View panel enables you to display a greyscale matte of the composited
layer. Solid objects should look completely white and transparent areas black.
Step-by-step Turn one person into interacting triplets
1
Layer the clips
Choose File>Import>Media and browse to
our four supplied source clips. Choose ‘Import
Selected’. Drag Clip 01 to the timeline. Place
Clip 02 on a parallel layer above Clip 01.
2
Add a mask
In the Effects browser drag Draw Mask
onto Clip 02. Click to place five control points
that select the left twin. This creates a hole on
the right, revealing the twin from the lower layer.
3
Test the mask
Play the clip. The split in the screen is
visible as the mask has a sharp edge. In the
Video Inspector go to the Draw mask section
and set the Feather to 20 to soften the edge.
4
Animate the mask
Scrub to 9:10. In Draw Mask click the
diamond add a keyframe icon next to Control
Points. Scrub forward to 10:00. Reposition the
middle control point to keep his hand visible.
7
Fine-tune the key
By default the compound clip’s green
colour becomes transparent. For a cleaner key
drag Fill Holes to 4.2. Increase Spill level to 43%
to remove green light reflected on the triplets.
5
Combine layers
Shift-click to select both layers in the
timeline. Choose File>New>Compound Clip.
Label it ‘Split Screen Compound’. This creates
a flattened version of the two layers.
8
Flatten the layers
Shift-click on the two layers and choose
File>New>Compound Clip to flatten the triplets
into one layer. Drag Clip 04 below this layer.
Drag Keyer onto the compound triplet layer.
6
Add a keying effect
Drag Clip 03 onto a timeline layer
below the compound clip. Click to select the
compound clip. From the Keying section of the
Effects browser drag Keyer onto the top layer.
9
Refine the key
Click ‘Sample Color’. Draw a rectangle to
select a large patch of green. This will create a
cleaner key. In Matte tools tweak the sliders to
lose the sharp edges around the triplets.