Modern bedroom Visualization, Vray GPU

[Muhammed_Hamed]

stezza Hello!

I render the image as sRGB in the cloud then download it and apply OCIO locally but get a totally incorrect result.
What am I missing?

V-Ray for Maya needs an OCIO configuration to apply the transforms you set in the file node. If the transforms are not applied, shading and lighting will look different.
Talking about scene-referred values here, this is not about viewing the data anymore

On the bright side I know that the Cloud team is working hard on getting this OCIO ready on the cloud, it should be here soon. I will ping you when this happens

Best,
Muhammed

Edit, V-Ray for Maya can do some of the transforms internally. I just checked with the Maya devs, all common IDTs should be working fine without OCIO
I think you can have a workflow in the cloud without OCIO, as long as you use the common IDT types like "utility linear sRGB" and "utility sRGB Texture", it is now about the viewer which is easy to solve.
If you have questions let me know

[Muhammed_Hamed]

Thanks a lot for your effort, Muhammed.

We had used the wrong ICC profile. Now the two workflows match perfectly.

For any Mac user: The ICC profile needs to go there -> /Library/ColorSync/Profiles

Good to hear! Happy rendering!

[Muhammed_Hamed]

stezza I updated my reply above, If possible can you upload me your scene or EXR.
You should be able to render in the cloud and apply OCIO locally in Nuke, Photoshop or the Frame buffer

[stezza]

Hi Muhammed, thanks for getting back.
Due to NDA with Autodesk I cant possibly share anything, but I have resolved it by simply adding colour corrections, exposure, curves, etc to try and match the original render and I got it pretty much spot on. Panic over for now.

[Muhammed_Hamed]

I'm glad you worked around the issue
I've tested this today, and the results are matching 1 to 1 ,there might be an issue on your side. Let me know if you get to test this again
And again official OCIO support on cloud is coming very soon. The team has been working on this for a while, It will make this workflow easier

Best,
Muhammed

[S_K_I]

Is that shader ball scene something you made or is it a file I can download somewhere? Thanks!

[Muhammed_Hamed]

Is that shader ball scene something you made or is it a file I can download somewhere? Thanks!

Hey!
It is something I created, and it is available for download here

https://forums.chaos.com/forum/v-ray...ene-for-vray-5

There are versions for Maya, C4D, Houdini and Modo if you use any of these let me know, and I will post links for these

Best,
Muhammed

[piotrus3333]

Original scene here, (Vray Next)



And ACES version below, (Reworked the fabrics using Sheen, UVW randomizer on paint, ACES, Multisub texture for variation on leaves, wood, metals on the wall..etc)
This more about Vray Next vs Vray 5, I could have spent some considerable time in Vray/Photoshop to fix the first render.. and the old hacks of using falloff maps in diffuse to fake the sheen effect, the workflow is just better and faster in Vray 5
About ACES, I think everyone should adapt to that in Vray.. Tone Mapping and wide gamut rendering are very powerful, and the workflow is very easy in Vray it takes couple of clicks to convert scenes.



Thanks for the kind words

Is it possible to see the tonemapped version of the image from NEXT? so it's more apples to apples comparison?
thanks.

[Muhammed_Hamed]

Is it possible to see the tonemapped version of the image from NEXT? so it's more apples to apples comparison?

Hey Marcin,
I don't have this EXR anymore, sorry

It could have taken me 15-20 minutes in Photoshop to tonemap this image and make it as appealing, it will never look the same as the ACES result but probably close
ACES affects global illumination and bouncing of light as explained in my post here
Specially with saturated lights, there is a significant difference

The ACES result is out of box, I didn't add anything to it. It just saves time and makes things easier.
I can produce good images without ACES, plenty of people could :P it is just that the good people at the Academy created this great system. It is a ongoing effort by some of the most respected color scientists and engineers in the industry, why wouldn't I use that

Best,
Muhammed

[piotrus3333]

Muhammed_Hamed
as I'm testing all this now I encountered an issue with aces 1.2 ocio - sometimes, randomly (no clue) sRGB transform doesn't work and is outputting RAW instead. sRGB D60 and both Recs 709 are always ok. have you ever got this bug?
3ds max 2020.

[Muhammed_Hamed]

Hey Marcin,

If you are using V-Ray GPU there is a bug with the view transform and the frame buffer. I logged a while back, it is a bit complicated but hopefully should be fixed soon
I think this is what you are running into, it resets the transform to sRGB none ACES regardless of what you selected.

Best,
Muhammed

[piotrus3333]

Hey Marcin,

If you are using V-Ray GPU there is a bug with the view transform and the frame buffer. I logged a while back, it is a bit complicated but hopefully should be fixed soon
I think this is what you are running into, it resets the transform to sRGB none ACES regardless of what you selected.

Best,
Muhammed

yep, thats the thing. thank you. I can live with sRGB D60, adds just a drop of good old KodakGOLD.