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From: | Thorsten Kaufmann |
Subject: | Re: [Openexr-devel] Slow deep exr |
Date: | Mon, 29 May 2017 07:21:54 +0000 |
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? 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. In the sample image the slowness is caused by the amount of samples that the mountains in the background have. I ran this through an internal node to false-colour-code the sample count: With the settings used red pixels represent “more than 50 samples per pixel (which is also per channel then). Whereas you have hardly more than 2 samples per pixel in the foreground. It would be a lot more efficient to render the mountains separate and non-deep if that is an option. I don’t know if Arnold has a way of forcing sample-merging for some objects? That would be a possibility too. Cheers, Thorsten --- Mackevision Medien Design GmbH T +49 711 93 30 48 661 address@hidden Geschäftsführer: Armin Pohl, Joachim Lincke, Jens Pohl --- |
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