[Mikhail Bekhterev]

Thank you for the suggestion. The QT does show that the files are million +. Prior to the black background issue I had another problem. I had lower-third and a logo over the main clip in FCP from Motion. Clip under 3 minutes long rendered fine but longer clips kept crashing. FCP tech support recommended reinstalling FCP and rendering Motion files. After reinstalling FCP I ended up with neither Motion nor rendered QT files showing transparent background (solid black instead). After writing here and couple of sleepless nights I remembered that I have the TimeMachine enabled and went back to the day before I reinstalled FCP. Now transparent shows properly and as far as the rendering is concerned I did it by rendering clips in sections and closing program after each render. Otherwise it would still crash and when loaded back up show as if nothing has been rendered. I’ll try rendered QT files next but hope that soon we’ll be able to skip that step and be able whole motion clips in FCP. 🙂

[Mikhail Bekhterev]

This looks like a happy ending. My story went total opposite. Clips were posting properly with transparent background (Motion 4 to FCP 7) but then FCP began to crash before completing render. Went through a bunch of steps suggested by Apple rep except the last one – replacing motion files with rendered quicktime movies. After I moved old Motion files and replaced with QT files transparency was gone. Now neither QT nor old motion files post with transparent background. Anyone had to resolve that issue?