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Rendering a 32bit project to an 8Bit codec
I have a project i’ve been doing in 32bit, because i need nice glows and blurs. it looks great but when i render it to an 8bit codec it clips all the values from 0 to 1.
is there anyway to preserve the look of the overbrights. i know i can’t get the actual values, but surely i can keep the look, like the red glow i have turns from a yellowish red dot surrounded by red, to just a flat red.
any ideas?
thanks
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15 Replies
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Rendering to an 8-bit codec should not affect the appearance of your 32-bpc composition. It will clip the color values but it should preserve the look.
Are you using a working color profile in your project? Is your exposure preview set to ‘0’ in the composition?
Darby Edelen
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Yep, i’m using 32bit linear, srgb workflow.
this is what it looks like in AE:
and this is what an 8 bit render looks like:
any ideas?
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I can’t reproduce this problem so there must be something else going on that we haven’t covered yet. Can you provide more information on your output module? A screenshot of your comp/timeline panel?
Darby Edelen
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do you have cs5.5? i could upload the project?
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Sure, upload a sample, but I won’t be able to look at it until I get into work in an hour or so 🙂
Darby Edelen
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here’s the 32 bit comp
4260_32bit.aep.zip -
I stand corrected. I do get the same results as you with this project. This appears to be the result of very high values in only the red color channel. If you want your rendered results to be closer to what you see in the comp viewer then you’re going to need to add some green and blue to the solid, either by increasing the green and blue black outputs in your levels effect or by changing the actual solid color.
To preview your 8bpc render I’d recommend creating an adjustment layer at the top of the composition, apply the levels effect and turn both Clip Output to Black and Clip output to White ‘On.’ You can set this layer to a Guide Layer so that it doesn’t have any additional affect on the rendered output.
Darby Edelen
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yeah seems weird. it does happen with the other channels too.
yeah that’s what i’ve started doing. but then i might as well comp 8 bit. not sure the 32bit is giving me much more if i can’t output it!
cheers thou
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May I suggest filing a bug?
https://www.adobe.com/cfusion/mmform/index.cfm?name=wishform
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
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do you think it is a bug then? i started to think it was a limitation with 32 bit.
if you open up the 32bit render in photoshop it shows that flat red too. strange.
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