Hi,
I am trying to compose a png sequence with CG background using Composure. But I find an interesting behavior of UE4.
First of all, the png sequence is generated by Daz3d. Daz3d already creates an alpha channel for each png file, so I thought it should be easy for me to get it to UE4 since no chrome key required.
But it seems the current media plate can’t handle the alpha channel. When I play the video in the media player, it shows the alpha channel, but when I add it to the media plate as a Media Texture Input, the alpha channel turns to black, so I can’t see the CG background.
If I take a single png file from the sequence and add it to the media plate as a Texture Input, the alpha channel works properly and I can see the CG background.
Is this by design? Is there a way to take advantage of an existing alpha channel in a png sequence, instead of using a chrome key?
Regards,
Peter
same as above — media player preview shows the alpha because the preview material does, but the media plate input in composure defaults to opaque unless you route the alpha. try feeding the alpha into the cg_element and make sure the plate is translucent. to isolate file vs plate, i test sequences with alpha video player from fab Alpha Video Player - Transparent Video UMG Widget & UI Media Component (UE5) | Fab — it plays png sequences with alpha correctly as UMG, so if it composites there without black bg the files are fine and its just the composure layer setup