Flares and Bloom are cut out by Alpha (almost solved)

Hanshoffnung1
Fri, 01 Sep 2023 07:51:53 +0000
Rendering

Hi,
I need help, because when i render, flares and bloom are kept within the mesh boundaries, and cut out by the background alpha. (the EXR files show everything, but when i import them in Davinci the problem occours)

As you can see in these pictures, one is without alpha and you can see the big flares and the bloom on the spaceship.
Once i enable “Accumulator includes alpha”, you can see from the picture that these are cut out by the alpha channel.
I used this console variable: r.PostProcessing.PropagateAlpha 1 as explained in the Unreal tooltip, exactly to allow bloom and flares to be renderend on alpha.

It seems that Unreal doesn’t multiply alpha the right way)

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