I am importing a 3D Render from Lightwave with a Premultiplied Alpha in AE as a Targe Sequence.
If I compare the render when I comp it on top a AE Solid with the Output of Fusion for example I get a very different/wrong comp if there a transparent/Motionblurred parts in the 3D Render.
Here is a Comparison with a render of 8 Cubes and comped in Fusion and AE (once interpreted as Straight and once as Premultiplied) over White, Black and a Color.
Here is the 3D Render and the Alpha Channel:
As you can see the rendering of Fusion is What I would call Right. What is AE doing and why?
How can I get the same output in AE?
Apply the Remove Color Matting effect.
Sorry, that makes it just more/different wrong...
Take a look at the two boxes that are second from the left. AE interprets them in the comp like they look in the Alpha Channel, without the highlights on the edges.
Seems you have to set the Project settings to 32bit float to get a clean comp out of a Premultiplied Alpha in AE!
Which makes no sense as the Targa is 8bit only...
Also the default setting is 8bit. Do I have to change it everytime or can I force it 32bit for every new comp?
Also does my render take longer just because I am in 32bit instead of 8bit?
AE-why do you make it all so complicated/illogical????