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.