Return-Path: Received: from moutng.kundenserver.de ([212.227.126.187] verified) by media-motion.tv (CommuniGate Pro SMTP 4.2.10) with ESMTP id 4780892 for AE-List@media-motion.tv; Fri, 20 Jul 2012 16:28:06 +0200 Received: from oxbaltgw01.schlund.de (oxbaltgw01.schlund.de [172.19.246.7]) by mrelayeu.kundenserver.de (node=mrbap4) with ESMTP (Nemesis) id 0MPXk1-1SwMyV2zbt-004ga0; Fri, 20 Jul 2012 16:31:58 +0200 Date: Fri, 20 Jul 2012 16:31:58 +0200 (CEST) From: "mylenium@mylenium.de" Reply-To: "mylenium@mylenium.de" To: After Effects Mail List Message-ID: <1535875922.710554.1342794718703.JavaMail.open-xchange@email.1und1.de> In-Reply-To: References: Subject: Re: [AE] Issue with Transparency in CS6 Raytracing MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_710553_709425112.1342794718654" X-Priority: 3 Importance: Medium X-Mailer: Open-Xchange Mailer v6.20.5-Rev1 X-Provags-ID: V02:K0:3w5XKLUltlBTN4p1MHQ46PUEl18Nb5aM444BGTHZFod WiIr+nxr4hKAvOK3730Q1ich22MmO/Y1InP6oycGuIWcFqwcbT XoHg7A2aEQBZgyCiZ0hd/zMzL/BVQg1AI6TmkEce03An7oU6Uc AX1X9I6WB7DPPZKrJOPWZrHvJOAvUzIC0yauj7irUggcCZ39he EpRPJi3T1jhLRpWyf5Iq18NiFgI62yFE1iodce0zQubf25bmgM M2vwuR/AJZhQE7oMGdVnWWPdbM4X+Uxb4Z8Y68ODcdRVyHoqJ1 UwQGNMBRL60KA+LYNKFDfa2vIcpzNwTKwOrreiE3cUzEoH5q9W I1O9jBDx3zaf2FwDOJCpQbNbOJjnpxNRbRR/wBvZ3DS3p8n/wy j8ZC/dZGdTx1yHyhvpazb6aBzyYHc8MESF2twjsiQKPdtui3kH B+2U0 ------=_Part_710553_709425112.1342794718654 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Either it's a design feature (set Alpha to opaque to avoid degenerate gener= ate colors with premultiplied backgrounds) or a bug (premature termination of t= he ray evaluation). Whatever it is, probably nothing you can fix. Mylenium [Pour Myl=C3=A8ne, ange sur terre] ----------------------------------------- www.mylenium.de "S=C3=A9bastien" hat am 20. Juli 2012 um 14:46 geschrie= ben: > Hi gang, >=20 > I have to export the alpha channel of my comp, nothing really fancy at f= irst, > but then I noticed that my semi-transparent extruded shape objects are > considered opaque. >=20 > You can see here on my screenshot: > https://www.dropbox.com/s/1f4u9v85d54sw7w/transparency.png > The selected > object is 45% opaque, and I should somehow see the checkboard through it,= but > no, the transparency is filled with some default black environment. >=20 > At first I thought it was because my difraction was at 1.5 but no matter= what > value I change, it's always looking opaque when I put it against a transp= arent > background (when I put an object behind it behaves correctly, it's only w= hen > the bg is transparent. >=20 > Any idea how to circumvent this ? Is it intended behavior ? (i'm quite n= ew to > Raytracing) >=20 > Thanks ! >=20 > Cheers, >=20 > Seb >=20 > -- > S=C3=A9bastien >=20 > L'ebook que Nicolas ne trouve pas tr=C3=A8s dr=C3=B4le, mais que tout le= monde adore > politikaillera.fr >=20 ------=_Part_710553_709425112.1342794718654 MIME-Version: 1.0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit

Either it's a design feature (set Alpha to opaque to avoid degenerate generate colors with premultiplied backgrounds) or a bug (premature termination of the ray evaluation). Whatever it is, probably nothing you can fix.

Mylenium

[Pour Mylène, ange sur terre]
-----------------------------------------
www.mylenium.de

"Sébastien" <yenaphe@gmail.com> hat am 20. Juli 2012 um 14:46 geschrieben:

Hi gang,

I have to export the alpha channel of my comp, nothing really fancy at first, but then I noticed that my semi-transparent extruded shape objects are considered opaque.

You can see here on my screenshot: https://www.dropbox.com/s/1f4u9v85d54sw7w/transparency.png The selected object is 45% opaque, and I should somehow see the checkboard through it, but no, the transparency is filled with some default black environment.

At first I thought it was because my difraction was at 1.5 but no matter what value I change, it's always looking opaque when I put it against a transparent background (when I put an object behind it behaves correctly, it's only when the bg is transparent.

Any idea how to circumvent this ? Is it intended behavior ? (i'm quite new to Raytracing)

Thanks !

Cheers,

Seb

--
Sébastien

L'ebook que Nicolas ne trouve pas très drôle, mais que tout le monde adore
politikaillera.fr

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