Hi Bob,
Alpha is not passed to Boris UI when applied as a Filter. You will need to bring the alpha file straight into FX UI. So,
1) apply FX as a Filter to a video clip & then launch Boris FX UI & layer on V2 the alpha file by bringing it straight in Boris FX UI etc
or
2) apply Boris FX as a Filter in Vegas to an Empty Event on V2 & then launch Boris FX UI & bring in the file with alpha in FX UI etc
or
3) apply Boris FX FX as a Generator (instead of applying it as a Filter to an Empty Event on V2) on V2 in Vegas & then launch
Boris FX UI & bring in the alpha file straight in there etc
note: this is a Static Generator with 1 frame duration so you won’t be able to animate. If you want to animate then you need to follow steps in 1 or 2.
Hope this helps.
– Mukesh Shah
Boris FX, Inc.