Chaos Corona Forum
Chaos Corona for Cinema 4D => [C4D] I need help! => Topic started by: 3dkobi on 2019-11-12, 09:06:19
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Hi guys,
I took an old scene I made 3 years ago in VRay and converted it to Corona in order to make some animations. The exterior shots are great but I'm having some problems in the interior...
I attached the first 3 frames - I'm having "flickering" in some areas with high glossiness - You can see it in the kitchen appliances in the back (which I can solve by simply deactivate those reflections), but the main problem is in the wine glasses. The first test render was set to a level of 5.5% noise and took about 1 hour per frame to render (16cores\32 threads machine), than I lowered the noise to 4% - the render took 2 hours per frame but the results are not much better.
The glass material is simple glass (screenshot attached)
So, is this a normal ?Any solution other than loewr the noise level ? I can't lower the noise threshold anymore - render times will get too high....
And another question - When I rendered a certain test frame to picture viewer it took 1 hour. When I rendered the same frame with same settings with Interactive render it took only 47 minuets to get to the same level noise. Why so much difference between the two ?
Peace,
Kobi
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Hi 3dkobi!
You could try to play with the MSI setting. Look at this article: https://help.c4d.corona-renderer.com/support/solutions/articles/12000035826-what-is-max-sample-intensity-msi-in-corona-renderer-for-cinema-4d-
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Hi 3dkobi!
You could try to play with the MSI setting. Look at this article: https://help.c4d.corona-renderer.com/support/solutions/articles/12000035826-what-is-max-sample-intensity-msi-in-corona-renderer-for-cinema-4d-
Thanks for the link, I read the article but didn't understand - Should I lower the MSI ?
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Yes, lower values mean less fireflies. But also less realistic illumination, so be careful. Also, the value of 0 is a special case, which wouldn't work for you, so don't set it to zero.
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Yes, lower values mean less fireflies. But also less realistic illumination, so be careful. Also, the value of 0 is a special case, which wouldn't work for you, so don't set it to zero.
Thanks, I will try this
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MSI actually won't affect materials with reflection/refraction glossiness at 1, so here are some other options:
- Lower the reflection and/or refraction glossiness of your materials which are showing the fireflies to something like 0,99 - this will let MSI kick in
- Use bloom and glare and sharpening and blurring in the VFB post (this may be unwanted if you are planning some post processing in other apps)
- Use highlight clamping (not to be mistaken with highlight compression!) - https://help.c4d.corona-renderer.com/support/solutions/articles/12000035830 (this may be unwanted if you are saving to 32 bits as you will lose high dynamic range)
- Fix it in post by clamping/blurring
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MSI actually won't affect materials with reflection/refraction glossiness at 1, so here are some other options:
- Lower the reflection and/or refraction glossiness of your materials which are showing the fireflies to something like 0,99 - this will let MSI kick in
- Use bloom and glare and sharpening and blurring in the VFB post (this may be unwanted if you are planning some post processing in other apps)
- Use highlight clamping (not to be mistaken with highlight compression!) - https://help.c4d.corona-renderer.com/support/solutions/articles/12000035830 (this may be unwanted if you are saving to 32 bits as you will lose high dynamic range)
- Fix it in post by clamping/blurring
Thanks for the info...
where can I find the "highlight clamping" ?
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Thanks for the info...
where can I find the "highlight clamping" ?
Have you checked the link I posted in my last message...?
https://help.c4d.corona-renderer.com/support/solutions/articles/12000035830
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Thanks for the info...
where can I find the "highlight clamping" ?
Have you checked the link I posted in my last message...?
https://help.c4d.corona-renderer.com/support/solutions/articles/12000035830
So sorry, I missed that...
Thanks
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MSI actually won't affect materials with reflection/refraction glossiness at 1, so here are some other options:
- Lower the reflection and/or refraction glossiness of your materials which are showing the fireflies to something like 0,99 - this will let MSI kick in
- Use bloom and glare and sharpening and blurring in the VFB post (this may be unwanted if you are planning some post processing in other apps)
- Use highlight clamping (not to be mistaken with highlight compression!) - https://help.c4d.corona-renderer.com/support/solutions/articles/12000035830 (this may be unwanted if you are saving to 32 bits as you will lose high dynamic range)
- Fix it in post by clamping/blurring
Thank you very much - using highlight clamping of 1.5 solved this issue
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Glad it solved the issue for you! Hopefully the lighting in the image isn't too off then...
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Hmm, while on the topic, what is the difference between MSI and Highlight clamping? If I recall correctly MSI is basically a GI clamp and the Highlight clamping clamps only the image post-linear image while the base calculations aren't changed?
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Hmm, while on the topic, what is the difference between MSI and Highlight clamping? If I recall correctly MSI is basically a GI clamp and the Highlight clamping clamps only the image post-linear image while the base calculations aren't changed?
The helpdesk knows it all ;)
MSI:
C4D: https://help.c4d.corona-renderer.com/support/solutions/articles/12000035826
3ds Max: https://coronarenderer.freshdesk.com/support/solutions/articles/5000515636
HC:
C4D: https://help.c4d.corona-renderer.com/support/solutions/articles/12000035830
3ds Max: https://coronarenderer.freshdesk.com/support/solutions/articles/12000006462