In the simple project attached, I try to render an plane with a gradient alpha to composite it in after effects. But when I import the rendered image (png with Straight or premultiplied alpha) in after effects the areas that are not fully opaque appear to be more transparent in after effects than in the C4D viewport.
In my example I have a white plane with gradient transparency. When I render it without alpha I should have the same image as the image rendered with alpha composite on black but semi transparent areas are darker on the last one. I have posted the 2 images to illustrate that.