Pre-Keyed media plate - How to use the alpha channel

Development Cinematics & Media Virtual Production
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1

Hi there,

in composure I want to use a pre-keyed footage as media plate.
How I can use the alpha channel in my png img sequence?

When I use it in composure it bring back it’s orginal background with no alpha

Any suggestion?

Thanks

2

I’m having the same issue here. Alpha channels do not work in my version of Unreal Engine 5.1, but they seem to work for this guy: How to Import Videos in Unreal Engine 5.1 - YouTube

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Hey @vikolaz, definitely check out that video and comment thread. You might have to set up the MediaPlate blueprint like in this picture (taken from James Luke’s comment on that video): Imgur: The magic of the Internet

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if it shows alpha in media player but not in the plate, composure is not forwarding the alpha band to the cg_element — wire the MediaTexture alpha into the layer input, or switch the plate material to translucent. verify the sequence itself is valid by playing it somewhere that handles alpha natively: i use alpha video player from fab Alpha Video Player - Transparent Video UMG Widget & UI Media Component (UE5) | Fab as a sanity check — drop in UMG widget handles png seq alpha out of the box with the right blend mode, if its good there its a composure layer wiring thing not the files