Been looking all over for this for sometime and I know it is possible as I did a comp years ago in AE 3, now I have AE 10.5.0.253.
When creating a new comp or even in an existing comp.
the background is set to black or some color.
I don't want that. I want a transparent, basically nothing in the background so when exported the export logo can go over the video.
Where is this button or procedurew to get rid of the black background?
I know in photoshop it's a layer you turn off or delete, but there is no background layer.
You need to export using a format that supports transparency/ Alpha channels and set the rendering options accordingly. There will always be a fill color. It simply works that way. Read the help on that stuff. To enable transparency preview, simply hit the checkerboard button at the comp bottom.
oh yeah, forgot about that button. been using motion and others for sometime now...
back to AE.