Applying SapphireTransitions to SpectraMatte without affecting Background

[Ra-ey Saleh]

“the only problem is that no effect you apply will affect the ‘edges’ of the Matte”

“True, that is why the Boris effects and the Sapphire effects are better when you use their keys as you can then apply their effects to the key.”

The alternative workflow that would allow you to create the effect without Boris or Sapphire’s key access would be to layer the sequence as outlined by you:

V3 keying material with spectramatte dialed, set to show alpha, and matte key nested on top (set to ‘Invert key’)
V2 Keying material with Sapphire transitions (NOT using a transition effect but in the way I described by ALT + Glow effect nesting and animating the Brightness)
V1 BG layer

Then, dummy edit the transition start and end of V3 the same as V2.
Copy both the Glow effects templates from V2 to a bin.
Step-into the Out-going seg of V3, and ALT+drop the Out-going Glow template from the bin onto the Spectramatte. Step-out.
Repeat for the Incoming seg.