Hey Gonzalo,
deep and flat do not live in different parts of the file. It is essentially the same data. With deep files each sample for every pixel in every channel is saved
separately
whereas in flat the samples are merged into a single pixel in every channel.
I have seen people do things like saving a flat beauty and deep “other” channels like position or the likes, but that does not really make much sense to me.
My guess would be that you’d have to write a separate non-deep version of the EXR if you want to be able to choose.
Cheers,
Thorsten
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Thorsten Kaufmann
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From: Gonzalo Garramuño [mailto:address@hidden
Sent: Montag, 29. Mai 2017 14:20
To: Thorsten Kaufmann <address@hidden>; address@hidden
Subject: Re: [Openexr-devel] Slow deep exr
Hi, Thorsten.
El 29/05/17 a las 04:21, Thorsten Kaufmann escribió:
Hey there,
so there is no "deep vs. beauty". It's simply a deepscanline image. I don't think it is even possible to mix
deep and non-deep images, is it?
No, but my understanding was that the deep and beauty info live in different parts of the image.
Deep is not an additional set of information but it stores all of the regular information in a more granular way.
So there is both more data to read and you more "work to do" (to blend the individual samples) which makes
reading deep images slower. The amount of additional samples depends a lot on the type of image you have
motionblur, dof making things way worse and of course on the renderer's implamentation and if samples
are merged and how.
So you mean that the beauty pic is composed of the deep samples? There's no decoupling of the deep and beauty data? That doesn't sound right. I remind you I only want to load the beauty picture, not the deep data (of which I have no use for now).
Thank you for looking into this,
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Gonzalo Garramuño