Vray gpu 5, tonemapping with OCIO with sRGB

V-Ray V-Ray for SketchUp General
1

Hi

How do You use OCIO for a tonemapping with sRGB.???

I have never used that option

What kind of advantages do we have using this method
And what kind of disadvantages we have using OCIO.???

I have been watching Adán Martin tutorials about that and is very impressive that tool.

He Also says that we can use this method with sRGB and get a Nice image.

Can You explain a little bit more about color management please.

If we are going to see Acescg for vray 6…well maybe is time to use OCIO i saw some renders in his tutorial using Aces and OCIO…and i was very impressed for the result… It was a sublime shot of colors, lights and everything looked so incredible.

Thanks again

2

​ I have never use that tool in all My life!!! I just use the normal tonemapping and is good but is not as professional as Acescg+OCIO
​ left is Acescg+OCIO and right is simple Acescg

As You can see is very obvius…Acescg+OCIO is awesome i really feel in the space.

Is miles away that using just simply sRGB…so we need an explanation about this… How do You use OCIO?

Right now Acescg is 1.3 so it is getting better

3

just use Filmic AMPAS. The same tone mapping curve.

4

Hi Marcin

I use that tool too, the power cube, but is not the same.

That is why sometimes i complain… There are some secrets with vray that i don’t really have a clue and then i saw some tutorials and is like…ohhh My god!!! That looks so incredible!!!

I have been using vray for almost 10 years Marcin… And sometimes i feel i don’t know the complete software.

Vray is a complete and very proffesional software, the only problem is that i have to spend all My weekends keep Learning and practicing since there is not too much material about complex things in vray.

I would like to see a tutorial by vray team explaining this.

Acescg+OCIO…=awesome renders!!!

Also i bought from 3d collective some luts and he explains we can use that luts in aces with OCIO and gets a Nice image!!! Even using srgb

Well is time for a complex tonemapping!!!

5

It’s actually pretty simple. First thing to know is that acescg in vray is the last thing to worry about. Forget about it for now. Filmic AMPAS is all you need for now. Slap it on a raw render and if that does not make it look at least good - some mistakes have been made before. materials? lights? nail that first. raw render + ampas curve. just ampas curve.

some comparisons I did a while back. there is a lot of misconceptions flying around.

6

Thanks for the hints Marcin…i already use the tonemapping… Ampas, powercube,etc.

I do My tonemapping almost using everything, white balance, luts, curves, exposure, color balance, hue-saturation and the fílmic tonemapping.

I understand that right now we don’t have Acescg for vray for sketchup, but Muhhamed told they are working hard to bring Acescg fir vray 6 for sketchup and that is great and i apreciate that… To be more profesional.

So i’m going to try use OCIO by My Own… Also i forget to told You Marcin that i’m from México and here we sometimes use vivid colors for a Big wall with a great texture… So for me and probably for Latinoamérica is great that we can have Acescg for vray 6.

Reflections, colors and natural light looks awesome with Acescg but if You use OCIO… Well that is Even better.

I don’t want to get behind the new methods that really looks better… Just because i use vray for sketchup… and not vray for 3d max or vray for maya.

If we can have a práctical way to use Acescg… Well is time to use OCIO.

Adan Martin is a Master… And i always watch his tutorials again and again in order to understand how Vray works in everything!!! and almost bought everything from 3d collective…skys, luts, dirt textures… 3d collective is great!!!

So sometimes i spend some money to get a Nice things like skys or dirt textures to use with composite for a better materials… So why i should’t use a better tonemapping…!!!

Vray for sketchup is a proffesional software…that needs to keep developing in order to get clients and of course… Build the house or a department since architecture only exists in spaces with real light and stones!!!

I do renders for My clients, so they can see how the space looks and if they liked and have the money sometimes i build in real life a house.

That is why i use vray for sketchup… To keep pushing my dream to build a house for people and i hope they enjoy my spaces in real life… Architecture is art and at the same time humanity…

7

Hi Luis,

Without proper ACES conversion for your input, you are just using the ACES tonemapping in the frame buffer. This is not ideal but if you like this tonemapping feel free to use it, this is art after all :slight_smile:

This ACES tonemapping expands mid-tone contrast and compresses shadows and highlights, which you can achieve using other methods in the frame buffer as well

You can set this up like this, make sure to download the ACES 1.2 folder and config file, then point your frame buffer to the path of your config file

Screenshot_337.jpg
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You can experiment with this in the frame buffer, like what I describe above.
You will need to wait for V6 to have a proper ACES workflow in V-Ray for SketchUp

This is normal, V-Ray is the Swiss Army knife of visualization, used in many industries like Visual Effects, ArchVis, Print and others.
There is probably no artist that is aware of all tools in V-Ray’s arsenal

Best,
Muhammed

8

@piotrus3333 Some cool examples you have in the video, thanks for your help as always :slight_smile:

9

@luisgamino2 are you referring to this video?

this is exactly what I was taking about. misinformation that leads to “Acescg+OCIO…=awesome renders!!!” statements.
physically impossible materials in Cornell box, considering gamma transform a tone mapping so basically comparing apples to oranges.. that is hardly helpful. and yes, you can easily incorporate color grading luts into VFB2 by going through ACEScc/cct for example…

I suggest to stick to this forum for now for ACES related info.

10

Hi Marcin and Muhhamed

I downloded the Aces 1.2 folder
( What is the config. File Muhhamed?)

But i didn’t find the OCIO Enviroment variable, where can i find those luts with OCIO?

Thanks

IMG_20220707_145338943_MP~3.jpg
IMG_20220707_145338943_MP~3.jpg1031×485 65.1 KB
I downloded that file Muhhamed and Marcin is that fine?

But i didnt find any kind of lut with OCIO

Thanks again

What kind of file should i use in the OCIO Enviroment variable?

PD. Yeah that was that video Marcin

11

Hi Muhhamed

I see… Is not time right now to think in Acescg, so i decided to leave this topic until vray 6 became a reality.

But for me this was a Nice introduction to an amazing colors, lights, natural effects, reflections, etc. ( More like the real life)

So i’m going to keep using My normal tonemapping for right now, i’m going to ask for some help when vray 6 came for sketchup, because i would like to change My Workflow in the tonemapping with the next major update.

Thanks again for your help Muhhamed
Thanks Marcin too