Vray GI and Color transmittance tests [maxwell] involved

[ipraiseg]

Here is the rendering after 'correcting' the materials

yeah, i have saw result of like above case when i set color mapping to gamma correction.
in my experience, i adjusted color correction using color correct plugin or auto contrast in photoshop to correct gamma. but i was wonder if this was right.
well any there another good idea?

adjust color correct as tweak gamma


dark multiplier- 1.2

[Gijs]

and a textured version, also changed the glossyness of the ball a little.
As you can see textures render very well without any changements other than changing max's input gamma settings for textures.

[jujubee]

Gijs - I'm impressed with your results. I've read threads on adjusting gamma and am lost. Is this something standard you do to all of your images with constant tweaks or do you have a particular method down - a 'magic-bullet' formula?

If so, would you mind sharing a quick step-by-step outline.

[Gijs]

Thanks,

it involves a few changes to your workflow, but once you get used to it, you're settled. This is not about constant tweaking.

I am working on an article wich describes a little more about the gamma thing and it is specifically targeted at people who were lost after reading the linear space thread.

[jacksc02]

looking forward to it gijs!

[Gijs]

Here is the rendering after 'correcting' the materials

yeah, i have saw result of like above case when i set color mapping to gamma correction.
in my experience, i adjusted color correction using color correct plugin or auto contrast in photoshop to correct gamma. but i was wonder if this was right.
well any there another good idea?

I sort of forgot about the color correct plugin after it was said to possibly cause trouble. I just ran a test with the file adjusting all colors with the gamma correction of colorcorrect plugin. As you can see, you gain back contrast and saturation.

[ipraiseg]

Thanks Gijs,

i have tested right before

looks samely

[thablanch]

Still a little lost, but really interesting topic..
Colorcorrect, can't seem to find it, a link would be nice

Thks

[Gijs]

You can find it here:
http://www.cuneytozdas.com/software/3dsmax/

[thablanch]

Ok, I was loking for a PShop plugin

[Gijs]

ah....right

well, just to be clear, the pictures I am showing here were not postprocessed.

[Morbid Angel]

good stuff gijs. I like the textured version. What I see in all of the images, is that shadows are too dark compared to a photo. In maxwell they are too bright. I think this is due to the camera settings I had when I took the picture, since then I have taken another with a more direct sun. I will post the results soon.

[GeneCrucean]

We all know that an artist can tweak a render to look like whatever, and vray will probably be a little easier for this because of the added controls. But, whats NOT based on opinion is the fact that both of these renderers say they are based on real world measurments and algorithms. Which means that there should be some level of consistancy between the two. To me it looks more like one of them has some incorrect calculations going on.

I would just like to understand how they are working perhaps at a deeper level. And to be honest, I dont think there will be a solution or end to this thread. It's more of a look how these renderers handles this specific situation.

[Gijs]

I think the fact that both arer physically based rendering engines, does not imply that there should be consistency in output.

Give two photographers the same camera, the same film and the same situation, and you would get two different photos. Now with renderings the difference is even bigger because there are many many more parameters.

But there is more to the story. What you see (output) is an interpretation of virtual reality. Even a photocamera makes an interpretation of a reality.
Both renderers have their own interpretation (colormapping or tonemapping, whatever you may call it) and that's IMO the main source for the differences you see.

[GeneCrucean]

I guess I wasn't really clear with my post.

I know there are lots of variables but my main point was that I could care less how close you can get a render to match a photo. What I do care about is how each renderer treats specific situations.