Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] General Discussion => Topic started by: augomol on 2014-03-20, 00:40:12

Title: Alpha6 vs Alpha5 test and problem
Post by: augomol on 2014-03-20, 00:40:12
Hi everyone!
I encountered a problem in alpha 6.
My test scene in alpha 6 is low contrast and other colors :(
The picture looks worse. It is a bag, feature or settings?
I did not change settings. And render with the same settings in alpha 6.
(http://i.imgur.com/JO4ZiQA.jpg)
Please help advice.
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: Ondra on 2014-03-20, 00:44:36
Were you using contrast in corona postproduction tab? It got reworked in A6, so it is possible you need to re-adjust your contrast settings
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: maru on 2014-03-20, 10:17:50
Could this be gamma difference?
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: augomol on 2014-03-20, 16:36:56
Quote
Could this be gamma difference?
No, gamma the same (2.2).

Were you using contrast in corona postproduction tab? It got reworked in A6, so it is possible you need to re-adjust your contrast settings
Yes. But if I insrease contrast to 4.8 in A6, colors is very different.
My settings
(http://i.imgur.com/Gyvsnfh.jpg)

increased contrast to 4.8 in alpha 6
(http://i.imgur.com/8qwE9uS.jpg)

Colors in alpha 6 are not accurate. And the situation does not change white balance :(
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: Ludvik Koutny on 2014-03-20, 16:50:08
Can you please try to render scene in Both A5 and A6 with contrast set to 1.0?
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: augomol on 2014-03-20, 20:02:58
Can you please try to render scene in Both A5 and A6 with contrast set to 1.0?
Not problem. Result with contrast=1
(http://i.imgur.com/dyQuEdX.jpg)

I try merge scene in alpha 6, but the result is not changed.
Leaf are not corrected color (texture leaf has other colors). Wood on the floor is acid yellow color in A6.
A5 is the same colors in vray. A6 is distorts colors.
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: Ludvik Koutny on 2014-03-20, 20:28:23
Corona now uses different colorspace. So rest of the color deviation will probably be due to that...
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: augomol on 2014-03-20, 21:07:03
Corona now uses different colorspace. So rest of the color deviation will probably be due to that...
And how can I correct this?
Because the result is not reliable.
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: Ludvik Koutny on 2014-03-20, 21:08:41
Corona now uses different colorspace. So rest of the color deviation will probably be due to that...
And how can I correct this?
Because the result is not reliable.

The new result should be more reliable. Just tweak materials and color correct textures to match the old output. Or tweak white balance a little...  :)
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: augomol on 2014-03-21, 00:06:26
The new result should be more reliable. Just tweak materials and color correct textures to match the old output. Or tweak white balance a little...  :)
Ok, thanks. I try it.
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: Ondra on 2014-03-21, 02:44:00
If it is lit with a CoronaSun then the colorspace could make the difference. You can try rendering a simple green constant-colored version to be sure it is not a material issue
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: augomol on 2014-03-22, 00:17:31
If it is lit with a CoronaSun then the namespace could make the difference. You can try rendering a simple green constant-colored version to be sure it is not a material issue
I think in new version Corona all materials need to be recreated. I'll check this. I realized that the new version A6 has increased brightness ies.
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: augomol on 2014-03-22, 01:30:09
But what I have noticed that the new version has changed refract. And I don't know where it is properly.
Nevertheless I like refract in A5.

(http://i.imgur.com/ALe10aG.jpg)
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: Jetboy on 2014-03-22, 12:27:04
I also migrated to v6, and noticed changed bump values, same scene - and bump looks crazy overpowered.
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: augomol on 2014-03-22, 20:08:02
I found problem in A6. Сolors distorted when we using portals in A6. In A5 with portal colors is lovely.
I will show an example:
(http://i.imgur.com/vwi4aoM.jpg)

Without portal in A6 result is much better and colors have an wide range as compared to the A5.
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: augomol on 2014-03-22, 20:13:25
Please pay attention to the leafs in A6 with portal and without portal.
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: augomol on 2014-03-24, 00:10:02
Keymaster please comment on this. Сolor distortion when using the portal can be considered a bug?
Title: Re: Alpha6 vs Alpha5 test and problem
Post by: Ondra on 2014-03-24, 01:43:31
I can take a look at the scene if you upload it (and create a bug report for it)