Strange ..

[SHD]

?

[Ondra]

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)

[Ludvik Koutny]

Did you touch HDcache settings? Because i did all i could to make sure default setup does not produce such artifacts.

[SHD]

with PT samples = 1125

[maru]

Shouldn't precomp step be set to 1?

[Sam75]

As maru said precomp should be 1

[SHD]

ok, i did with precomp=1

[Sam75]

can you post the scene without the statue so I can give it a try ?

[SHD]

can you post the scene without the statue so I can give it a try ?

yes, np, max 2012

[Ondra]

try increasing position sensitivity of HDcache

[SHD]

try increasing position sensitivity of HDcache

you're right, thx

[Sam75]

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 ?

[SHD]

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 ?

[Sam75]

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

[Sam75]

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.

[Ondra]

green spots are where HD cache was not used at all

[SHD]

pos = 70
i think good.

[Sam75]

pos = 70
i think good.

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

[SHD]

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

[maru]

Does changing values in Postprocessing tab affect stuff like antialiasing, sampling? If yes, then what happens when I change these values DURING rendering?

[Ondra]

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.

[maru]

Informative. Thanks.

[cecofuli]

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

[cecofuli]

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.

[Ondra]

do you have exit color set to black?

[cecofuli]

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

[Ondra]

ok, but changing the renderer does not reset the settings, right?

[cecofuli]

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 =)

[Polymax]

Really weird red pixels appear only in this light model, with other variants I could not find them!

[maru]

Is the strange red colour gone when you delete the red teapot?

[cecofuli]

Yes. You can try yourself. The file is in the attachment. Very simple scene.

[Polymax]

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:

[cecofuli]

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!

[Polymax]

Ok. No Bugs here :)!