Chaos Corona Forum
Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: murirtin on 2015-11-10, 15:10:44
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Guys Need One more help
Still noise after 23 /38 pass
how can i reduce this noise?
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Number of passes does not mean anything. How much time did it take to render?
You are using strange sampling settings. Doesn't it render faster if you reset to defaults? (GivsAA and LSM)
How are the ceiling lamps made? Can you show viewport screenshots?
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no it takes time but before that sampling there was to much noise , after doing that it reduce but not going permanently
last 38 pas take more then 30 min
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You are rendering with 64 gi samples and 256 direct light samples per pixel per pass. That is a lot. No wonder it renders slowly. But it looks like something is wrong with the scene. Any chance you could upload it here or in our support system? https://coronarenderer.freshdesk.com/support/tickets/new
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the zip size is to big to upload ,
is there any way?
like is there any problem on light ?
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check those it might help you to find the problem
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Nope, this does not help.
There might be some problem with lights, I do not know as I do not have the scene. How are they modeled? Can you show screenshots?
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Sorry for late reply here is my screen share
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We will not be able to help you if you cannot provide us with any useful information.
Can you show us a closeup of the light's "frame" - the place where light is nested inside the case object, the glass, etc. I mean the very close view - so that you can see how it's made. For example: if there is glass in front of the light. You should also select the light object and show the modify panel with the light's properties visible.
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No there is no glass in front of the light source
check the attachment of light option
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Ok, what is this small white disc?
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its corona light material...
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even though delete this object i put for a render ,
still the same thing on
still there is lots of noise on CESSENTIAL_Direct
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What is the size of the scene? Can you send it via WeTransfer to support@corona-renderer.com ? And/or start a ticket here? https://coronarenderer.freshdesk.com/support/tickets/new
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sure
sending
........
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File send_(Corona Test)
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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
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Oh. So which version of Corona are you using?
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corona V1.1x
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Why?
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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
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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.
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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 ?).
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Thanks maru
for your Help ...
i m really new in Corona but now it will help me a lot to go head .
thanks again
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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.
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maybe using of Rayswitch Material could do some improvement.
Greetz
Lucutus
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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.