I have a problem with rendering of movie (imported as plain) behind a static transparent picture with alpha (also imported as plain with alpha enabled) in Cycles.
Everything looks OK in Material Viewport Shading:
The problem becomes when I switch to Rendered Viewport Shading or when I want to render the final video. If the camera stays before the transparent picture, the movie behind the transparent part of picture is black:
The movie becomes visible when the camera moves forward cross the transparent picture and stays directly before the movie and the transparent picture is behind.
How can I manage the visibility of movie behind the transparent png?
