Out of focus edges + straight alpha

[tommiegeraedts]

So I managed to render with an alpha channel by enabling that option in the settings,
but when I have a very shallow depth of field, and some edges in the scene get very blurry, the HDR map is still showing in the Out of focus edge.
I import in AE and put the Alpha mode on 'Straight-Unmatted'.
Does anyone know how to still use an HDR map for reflections, but not have it 'shine through' the out of focus edges that border transparency?
Do C4D compositing tags work here?

Thanks !

[aoktar]

"Keep environment" is your best friend. Another friends are "premultiply alpha", "disable part-alpha" in camera_imager and video tutorials from Otoy documents.
C4D compositing tag is stranger to us.