Cinema4D version 2021.1-RC2(R3) (Current 2021) 04.10.2021

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Re: Cinema4D version 2021.1 RC2 (Current 2021.1) 17.09.2021

Postby lanklaf » Mon Sep 20, 2021 9:08 pm

lanklaf Mon Sep 20, 2021 9:08 pm
Hi everyone!
Does anyone know why the D65 white light spectrum gives a reddish tint and how to work with D65 properly?
Screenshots are 4 posts above.
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Re: Cinema4D version 2021.1 RC2 (Current 2021.1) 17.09.2021

Postby jayroth2020 » Mon Sep 20, 2021 11:25 pm

jayroth2020 Mon Sep 20, 2021 11:25 pm
Can you post your scene file, please? Thanks!
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Re: Cinema4D version 2021.1 RC2 (Current 2021.1) 17.09.2021

Postby lanklaf » Mon Sep 20, 2021 11:35 pm

lanklaf Mon Sep 20, 2021 11:35 pm
jayroth2020 wrote:Can you post your scene file, please? Thanks!

Sure, here:
Thanks!
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Re: Cinema4D version 2021.1 RC2 (Current 2021.1) 17.09.2021

Postby jayroth2020 » Tue Sep 21, 2021 12:22 am

jayroth2020 Tue Sep 21, 2021 12:22 am
@lanklaf, I noticed your file did not have the proper settings on the Camera OICO View dropdown, which should be ACES:sRGB and the Live Viewer, of course, would then require the Colorspace menu to be set to OCIO. In addition, the Camera tag would then need to be set to a Linear response curve. I would try these settings be used as I am not sure if/how the old color pipeline was changed when the new color management system was installed, or if/how the old system supports a D65 white point. I will send a link of this thread to the dev for comment.
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Re: Cinema4D version 2021.1 RC2 (Current 2021.1) 17.09.2021

Postby lanklaf » Tue Sep 21, 2021 12:33 am

lanklaf Tue Sep 21, 2021 12:33 am
jayroth2020 wrote:@lanklaf, I noticed your file did not have the proper settings on the Camera OICO View dropdown, which should be ACES:sRGB and the Live Viewer, of course, would then require the Colorspace menu to be set to OCIO. In addition, the Camera tag would then need to be set to a Linear response curve. I would try these settings be used as I am not sure if/how the old color pipeline was changed when the new color management system was installed, or if/how the old system supports a D65 white point. I will send a link of this thread to the dev for comment.

Thanks!

It is ACES:sRGB, it might not show up because your config file is in a different location. Also, the response curve does not change anything in OCIO mode.
OCIO doesn't matter because even the LDR preview has a reddish tint in the D65 white light spectrum.

I have no idea if this is a bug, or just don't understand how to use it correctly.
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Re: Cinema4D version 2021.1 RC2 (Current 2021.1) 17.09.2021

Postby karl » Tue Sep 21, 2021 12:36 am

karl Tue Sep 21, 2021 12:36 am
lanklaf wrote:Hi everyone!
Does anyone know why the D65 white light spectrum gives a reddish tint and how to work with D65 properly?
Screenshots are 4 posts above.


Please see my reply in the Octane core thread here.
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Re: Cinema4D version 2021.1 RC2 (Current 2021.1) 17.09.2021

Postby lanklaf » Tue Sep 21, 2021 12:41 am

lanklaf Tue Sep 21, 2021 12:41 am
karu wrote:
lanklaf wrote:Hi everyone!
Does anyone know why the D65 white light spectrum gives a reddish tint and how to work with D65 properly?
Screenshots are 4 posts above.


Please see my reply in the Octane core thread here.


Thanks @karu!

So can we expect updates to existing sky models for D65? :)
What are the advantages of the D65 over legacy / flat?
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Re: Cinema4D version 2021.1 RC2 (Current 2021.1) 17.09.2021

Postby karl » Tue Sep 21, 2021 1:03 am

karl Tue Sep 21, 2021 1:03 am
lanklaf wrote:
karu wrote:
lanklaf wrote:Hi everyone!
Does anyone know why the D65 white light spectrum gives a reddish tint and how to work with D65 properly?
Screenshots are 4 posts above.


Please see my reply in the Octane core thread here.


Thanks @karu!

So can we expect updates to existing sky models for D65? :)
What are the advantages of the D65 over legacy / flat?


D65 is a more realistic spectrum that would generally be considered "white" in more situations, whereas the old flat spectrum would often be considered quite pink. Of course it's all down to the viewing conditions and the exact white that the viewer is adapted to, but D65 is more standard. It really only makes a difference when the scene makes use of the spectral behavior of light such as by using spectral emitters (e.g. the daylight models) or dispersion (e.g. creating a rainbow with a prism). There is no reason to use D65 instead of legacy/flat if you aren't any happier with the results.

The Hosek-Wilkie, Nishita and Preetham daylight models would not be updated, because these are absolute spectral models designed to simulate the real world - the fact that they look different depending on the white to which the viewer is adapted is physically correct and a desired outcome of the models. The Octane daylight model is a bit different because it's not based on scientific research (as far as I'm aware) but in order to maintain consistency with the other daylight models (and reduce complexity) it has been retroactively treated as another absolute spectral model. Since the Octane daylight model is not wholly concerned with physically accurate simulation, it is assumed that people using it would be OK with either using the legacy/flat white spectrum or D65+white balance.

It is unfortunate that the default setup (D65 white spectrum and Octane daylight model) produces a reddish tint though. I will think about whether there's a nice solution to that that doesn't break backwards compatibility. It may be to just make the Hosek-Wilkie daylight model the default instead.
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Re: Cinema4D version 2021.1 RC2 (Current 2021.1) 17.09.2021

Postby Sohaibmocro » Tue Sep 21, 2021 12:56 pm

Sohaibmocro Tue Sep 21, 2021 12:56 pm
Great release Aoktar, thank you.

There's a bug that persists in vdbs throughout all of the 2021 c4d releases, when looking at a vdb through the voxel box of another vdb. The volume in the back looks different when viewed through the box of another vdb. In the screenshots you can see what I mean. This makes octane 2021 unusable for me at this point. The vdbs are not intersecting.

The "dirt visibility" option in the object tag also seems to have been removed in 2021 and the latest 2020.1.5 versions. Is this option permanently gone? I found it very useful.

Thank you!
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WhatsApp Image 2021-09-18 at 20.59.02.jpeg
WhatsApp Image 2021-09-18 at 20.58.54.jpeg
WhatsApp Image 2021-09-18 at 21.01.39.jpeg
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Re: Cinema4D version 2021.1 RC2 (Current 2021.1) 17.09.2021

Postby aoktar » Tue Sep 21, 2021 1:09 pm

aoktar Tue Sep 21, 2021 1:09 pm
Sohaibmocro wrote:Great release Aoktar, thank you.

There's a bug that persists in vdbs throughout all of the 2021 c4d releases, when looking at a vdb through the voxel box of another vdb. The volume in the back looks different when viewed through the box of another vdb. In the screenshots you can see what I mean. This makes octane 2021 unusable for me at this point. The vdbs are not intersecting.

The "dirt visibility" option in the object tag also seems to have been removed in 2021 and the latest 2020.1.5 versions. Is this option permanently gone? I found it very useful.

Thank you!


First is not plugin related and needs a scene to check what you say. Second is a mistake on my side, not sure why I've disabled it. But I'll bring back for next.
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