Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: SHD on 2013-01-04, 18:59:32

Title: Strange ..
Post by: SHD on 2013-01-04, 18:59:32
?
Title: Re: Strange ..
Post by: Ondra on 2013-01-04, 19:29:26
Looks like some standard splotches - the scene is hard to render with small openings, as demonstrated by high level of noise in PT+PT image. Try increasing "PT samples" in HD cache rollout (2 to 10 times more)
Title: Re: Strange ..
Post by: Ludvik Koutny on 2013-01-04, 19:41:42
Did you touch HDcache settings? Because i did all i could to make sure default setup does not produce such artifacts.
Title: Re: Strange ..
Post by: SHD on 2013-01-04, 19:42:41
with PT samples = 1125
Title: Re: Strange ..
Post by: maru on 2013-01-04, 20:40:22
Shouldn't precomp step be set to 1?
Title: Re: Strange ..
Post by: Sam75 on 2013-01-05, 11:28:40
As maru said precomp should be 1
Title: Re: Strange ..
Post by: SHD on 2013-01-05, 13:03:31
ok, i did with precomp=1
Title: Re: Strange ..
Post by: Sam75 on 2013-01-05, 13:20:42
can you post the scene without the statue so I can give it a try ?
Title: Re: Strange ..
Post by: SHD on 2013-01-05, 14:02:17
can you post the scene without the statue so I can give it a try ?
yes, np, max 2012
Title: Re: Strange ..
Post by: Ondra on 2013-01-05, 14:03:19
try increasing position sensitivity of HDcache
Title: Re: Strange ..
Post by: SHD on 2013-01-05, 14:57:27
try increasing position sensitivity of HDcache
you're right, thx
Title: Re: Strange ..
Post by: Sam75 on 2013-01-05, 15:10:07
try increasing position sensitivity of HDcache
you're right, thx

Are you sure it's fixed ? Not for me

Keymaster, the green spots in HDcache pre computing are primary bounces ?

Title: Re: Strange ..
Post by: SHD on 2013-01-05, 15:12:37
try increasing position sensitivity of HDcache
you're right, thx

Are you sure it's fixed ? Not for me

Keymaster, the green spots in HDcache pre computing are primary bounces ?


Title: Re: Strange ..
Post by: Sam75 on 2013-01-05, 15:13:26
try increasing position sensitivity of HDcache
you're right, thx

Are you sure it's fixed ? Not for me

Keymaster, the green spots in HDcache pre computing are primary bounces ?


indeed much better lol
Title: Re: Strange ..
Post by: Sam75 on 2013-01-05, 15:15:28
Keymaster, even with position at 100 there still is a problem compared to PT

That brighter region corresponds to the green spots of HDcache, for some reason it doesn't blend well.
Title: Re: Strange ..
Post by: Ondra on 2013-01-05, 15:26:57
green spots are where HD cache was not used at all
Title: Re: Strange ..
Post by: SHD on 2013-01-05, 15:28:50
pos = 70
i think good.
Title: Re: Strange ..
Post by: Sam75 on 2013-01-05, 16:34:11
pos = 70
i think good.

because your render is too dark, try with exposure compensation at 1 and highlight burn at 1.4
Title: Re: Strange ..
Post by: SHD on 2013-01-05, 18:48:38
pos = 70
i think good.

because your render is too dark, try with exposure compensation at 1 and highlight burn at 1.4

possible, but even right now is better, the rest of the details. Now I'm interested glass in corona
Title: Re: Strange ..
Post by: maru on 2013-01-05, 18:49:34
Does changing values in Postprocessing tab affect stuff like antialiasing, sampling? If yes, then what happens when I change these values DURING rendering?
Title: Re: Strange ..
Post by: Ondra on 2013-01-05, 19:32:12
Does changing values in Postprocessing tab affect stuff like antialiasing, sampling? If yes, then what happens when I change these values DURING rendering?
the core always uses the values from beginning of the render. But it is used only to correct max sample intensity.
Title: Re: Strange ..
Post by: maru on 2013-01-05, 20:29:47
Informative. Thanks.
Title: Re: Strange ..
Post by: cecofuli on 2013-03-21, 19:48:55
Ok, I played with this scene. With A4 and pos = 70 the splotches remain.
I don't have any "debugging" option to see how to solve the HD cache problem in the ceiling.
Next, there are some strange red pixels under the teapot.
The "black" pixels or the "very dark noise" near the base on the chrome teapot are present by the too hight contrast in Post-production rollout.


Res: 1920x1400 = 30 min at 170 pass

(http://www.francescolegrenzi.com/Temp/112_Corona_Test.jpg)



Title: Re: Strange ..
Post by: cecofuli on 2013-03-22, 10:33:47
I solved the HD cache problem. But, after 8 hours at 4000 px, there are a lot of noise in the teapot, some bad antialiasing and strange red pixels.

(http://www.francescolegrenzi.com/Temp/114_Corona_Test.jpg)
Title: Re: Strange ..
Post by: Ondra on 2013-03-22, 11:20:26
do you have exit color set to black?
Title: Re: Strange ..
Post by: cecofuli on 2013-03-22, 11:25:21
Yes. I reset the Corona setting (change from scaneline to Corna) change prm PT+PT to PT+HD, change some HD parameters and click render. During the render I changed some Post production parameters. That's all. In attachment the scene
Title: Re: Strange ..
Post by: Ondra on 2013-03-22, 11:49:11
ok, but changing the renderer does not reset the settings, right?
Title: Re: Strange ..
Post by: cecofuli on 2013-03-22, 12:07:46
Keymaster, no, you wrong :)
If you change from Corona to Scanline and than go again in Corona, the Corona settings are reset.
I used this tips for years with VRay =)
Title: Re: Strange ..
Post by: Polymax on 2013-03-22, 13:21:56
Really weird red pixels appear only in this light model, with other variants I could not find them!
Title: Re: Strange ..
Post by: maru on 2013-03-22, 14:29:41
Is the strange red colour gone when you delete the red teapot?
Title: Re: Strange ..
Post by: cecofuli on 2013-03-22, 14:38:09
Yes. You can try yourself. The file is in the attachment. Very simple scene.
Title: Re: Strange ..
Post by: Polymax on 2013-03-22, 19:13:58
I created a scene over again, re-modeled the interior, following the dimensions. And render again. As a result of such errors are not found! I think the whole problem was incorrect conversion scenes from Vray.
In your scene use the Vray exposure, VraySun, VraySky, and there were errors in geometry!
I share my scene:
Title: Re: Strange ..
Post by: cecofuli on 2013-03-22, 19:19:06
Hi Polymax,
this is not my scene. It was created by SHD =)
I didn't see the VRay stuff inside. I'm stupid! ^_^
Sorry for the waste time!
Title: Re: Strange ..
Post by: Polymax on 2013-03-22, 19:21:46
Ok. No Bugs here :)!