Thanks again for your suggestions.
I am opening in After Effects and there is no additional information for an alpha channel.
cinema4D is not using the render settings I am setting up.
I think this maybe because I am making a preview via:
Render > Make Preview.
I click Quicktime and under options select millions+
So, this is not actually a render output ??
not using render settings ??
is there another way to output a render without a third party software ?
THANK-YOU