Still noise

[murirtin]

File send_(Corona Test)

[Lucutus]

btw in your other Thread u wrote that you are using corona V1.1x

maybe updating to 1.3 wil help you also.

Greetz

Lucutus

[maru]

Oh. So which version of Corona are you using?

[murirtin]

corona V1.1x

[maru]

Why?

[murirtin]

do i need to pay again for the latest version,
and if update did it fix the problem,
please make sure first , try that on latest version
thanks

[maru]

do i need to pay again for the latest version,

It depends on what kind of license you currently own. I couldn't find your license.

The update itself won't "fix the problem" by itself. But it has some improvements, including an error messaging window, which would help you identify some of your scene problems. Here they are:
1. Gamma settings are wrong. Please always use these settings when using Corona:
https://coronarenderer.freshdesk.com/support/solutions/articles/5000515647
2. The glowing parts of light fixtures should be using Corona mtl with self illumination instead of CoronaLightmtl, see: https://coronarenderer.freshdesk.com/support/solutions/articles/5000515603
3. There are some portals placed incorrectly - they should cap the window holes. Some portal(s?) was also intersecting with the wall. See: https://coronarenderer.freshdesk.com/support/solutions/articles/5000501660
4. "mirror001" object - the light is intersecting with the mirror - this should be fixed
5. The most noisy area is caused by environmental light entering through the small window on the other side of the room - you need to reposition the portal in it so that it strictly caps the window, it helps a lot. Another idea would be to slightly decrease the intensity of skylight.
6. Setting sampling to GIvsAA: 16 , LSM: 4 seems to be an optimal solution, although it might require additional tweaking.

I am attaching a comparison of your original scene, and the "fixed" version. Also a 5 minutes render which looks pretty ok, so if you allow one hour or so for the image to bake (on similar system) then it should look fine.

[Juraj]

it's twice faster but all those glossies still interact horribly with each other, with that special kind of "super noise" being at some places, most notably at left (is that some sort of GI reflectice caustics ?).

[murirtin]

Thanks maru
for your Help ...
i m really new in Corona but now it will help me a lot to go head .
thanks again

[maru]

it's twice faster but all those glossies still interact horribly with each other, with that special kind of "super noise" being at some places, most notably at left (is that some sort of GI reflectice caustics ?).

The super noise at the left side of the image is actually direct light entering through the tiny window seen in the center of the image (yeah, now you're thinking with panoramas ;) ). It's a complex lighting situation and even placing a portal in there does not help much. It's a bit like Ondrej's example of what is impossible to render - a nuclear explosion in another room seen through a keyhole.

[Lucutus]

maybe using of Rayswitch Material could do some improvement.

Greetz

Lucutus

[Nekrobul]

it's twice faster but all those glossies still interact horribly with each other, with that special kind of "super noise" being at some places, most notably at left (is that some sort of GI reflectice caustics ?).

The super noise at the left side of the image is actually direct light entering through the tiny window seen in the center of the image (yeah, now you're thinking with panoramas ;) ). It's a complex lighting situation and even placing a portal in there does not help much. It's a bit like Ondrej's example of what is impossible to render - a nuclear explosion in another room seen through a keyhole.

I have one stupid idea about it. But it might work.

What if replace enviroment lithing with simple corona lights? Might look kind'a strange but with a little tweaking might work out.