Chaos Corona Forum
Chaos Corona for Cinema 4D => [C4D] Bug Reporting => Topic started by: Seth Richardson on 2015-12-01, 22:03:14
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So I have noticed that Corona VFB is doubling the gamma. Here is an example.
Is there any reason for this and how do we match the two?
(http://i.imgur.com/AY44fuc.jpg)
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I don't seem to be getting the same here, can you upload a scene file?
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Perhaps you should check if the exposure settings are the same in both?
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Are you using a high gamut monitor? I have had years of frustration with vray and gamma and I have also noticed that if I use the interactive renderer in Corona on a high gammut monitor the colours are different to the editor. I now have an sRGB monitor as my main monitor as its just not worth the hassle.
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I do have a high gamut monitor yes, however its calibrated to SRGB on profile one.
This is a bug I think because when I mouse over the corona VFB it flashes between the over gamma'd version and the linear version. The windows originally matched with C4D set to SRGB but I changed it to linear to get the right gamma out of it. You can tell that Corona is wrong if you look at the red I have on the slider for the material vs the pink you see in the VFB. Even the material preview below in the screenshot you can see the proper colors and gamma vs Corona VFB.
Classic double gamma.
I will upload though
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Could you upload the scene, pls? We'd like to look into the issue. Thanks!
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I have very similar problem with the color differences between Corona and Cinema PV.
Couple days ago this problem don't existed.
(https://i.imgur.com/4AFPREW.png)
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I don't think there is any issue with R18, OSX.
...
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iacdxb, you have same problem but it's hard to see in two separate viewers.
Here you can see the differences.
(https://i.imgur.com/XGVV3rt.png)
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iacdxb, you have same problem but it's hard to see in two separate viewers.
Here you can see the differences.
Small minor correction setting can be set with VFB post tab....! have you tried to compare with view port render....?
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There is a difference, I notice that it doesn't matter whether Corona post-processing is applied or not (eg you can turn off Tone Mapping etc and there is still a difference). Also, there is no difference if you save to EXR from the PV and then from the VFB, both EXRs looked the same for me in Photoshop.
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Hello friends, I wanted to tell you the following.
Working with Vray and watching many tutorials, the best way to work is to have the work profile in linear mode.
In this way all the textures change, and you must work with very clear textures.
since the final render must be seen with very clear textures.
This result is to be able to play with high counts values in post, achieving spectacular results.
The render should come out as a photo RAW 32 bits with all the colors very clear and it is in post that you create the settings.
However!! I do not know if Corona Render should work in the same way. since I have performed the same steps as Vray in Corona, but the results are not the same.
I wanted to know if you work the same?
There is some tutorial to know about this topic.
How is the right color profile to work with Corona?
Thank you
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Hi Ozwald, yes Linear workflow should be used - see https://help.c4d.corona-renderer.com/support/solutions/articles/12000010221 (https://help.c4d.corona-renderer.com/support/solutions/articles/12000010221)
If you think there is an issue ("since I have performed the same steps as Vray in Corona, but the results are not the same.") can you let us know what steps, and show what the results were?
Thanks!
Tom
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Hi Ozwald, yes Linear workflow should be used - see https://help.c4d.corona-renderer.com/support/solutions/articles/12000010221 (https://help.c4d.corona-renderer.com/support/solutions/articles/12000010221)
If you think there is an issue ("since I have performed the same steps as Vray in Corona, but the results are not the same.") can you let us know what steps, and show what the results were?
Thanks!
Tom
Project configuration> Linear workflow: on
Project settings> Input color profile: sRGB
I was placing in Linear color profile and not sRGB I think that was the problem.
I'm going to prove.
Thank you very much for the contribution
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I have the exact same problem. Didn't notice that before. The image saved directly from the corona vfb looks perfect, however saved from the c4d
picture viewer or via a saving path it looks like the gamma is too low. I tried to fix it in post but it seems not to be possible to match the original image with
gamma corrections. Saving the image and passes by hand from the corona vfb seems to solve the problem, but for an animation with many frames
that's not doable. Would really appreciate any ideas even for just temporary workarounds.
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Same problem here :-)
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I kind of feel that this topic hasn't really been solved, but got a bit forgotten, so I'm posting it again in this section.
Is there a way to solve the issue discussed in this thread?
https://forum.corona-renderer.com/index.php?topic=10472.0
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It hasn't been forgotten. With movements being made on future releases, bug testing will resume soon and B1 bugs will be looked at then.
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I just wanted to bring this one out of the archived topics. I am experiencing the same issues as the people who posted before me and I am wondering if everyone else has the same problem?
Based on some quick feedback from my colleagues I don't think I'm the only one with this problem.
Running the latest Beta 2018-05-30 on Windows 8.1 .
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(https://media.giphy.com/media/2zcmiu0TohZrY0GSjp/giphy.gif)
As you can see, Issue is still present in latest Beta2.
Occurs with 8 & 16 bpc formats. Most apparent in dark areas, blacks...
32 bpc is OK.
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Still any fix? I have to PrtScr and crop all my renders instead of just save via picture viewer...
(linear workflow / sRGB color space)
(https://i.ibb.co/5c8s1GK/vfb.png) (https://ibb.co/5c8s1GK) (https://i.ibb.co/WF2QRJM/c4d.png) (https://ibb.co/WF2QRJM)
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same problem here!
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So this just got moved to resolved today, does that mean we can expect it resolved in the next daily?
Would be really awesome to be able to save images over night / render animation without the gamma issue destroying the images!
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Although it is 2022, there are reports of the same problem with the macOS version of Corona 8, hotfix1.
does anyone know how to solve it?