Hello everyone,
I am trying to get an internal animation done with corona and Corona is showing the great results, I only have a big issue with trying to eliminate the noise from the reflections. Any help I will really appreciate. Also any help with the best render settings for animation flickering free would be really appreciated. Thanks a lot!
I guess you are using round corners as a material option.
If you model thouse round corners, you won’t have the problem.
there is no round corners on materials
btw thanks for so quick reply
A better screenshot/render would help because we have no idea what we’re looking at. 
I would guess these are reflective caustics. If so, you can completely disable reflective caustics or weaken them using rayswitch material/map.
See the examples at the bottom:
https://coronarenderer.freshdesk.com/support/solutions/articles/5000529341
Thanks for helping I will try to use rayswitch material and eliminate the possibility of caustics involved and will have a new screen attached
Maybe more antialiasing is required? The images you are showing - after how many passes and how much time per frame is this?
My settings was 36/2 10 passes 15 minutes on i7 3770k for the HD resolution The reason behind is that I got a very fast reasonable clean pass in the lighting and GI but reflection is a nightmare. I am rising it to 20 passes and even to 50 to see the result but even from 50 passes I got reflection noisy which cause an animation flickering. See attached. I am sorry to not post the entire shot only fragments because we are under non disclosure agreement.
Hi,
today I got a nice light passes, but the beauty was so noisy in the steeinless metal. The solution was lower bump (0,002 ) and a bit “grayer” bump and light map in the materials setups. That solved my problem.
Maybe that’s help for you too.
If you get good quality light/gi after 20 passes and bad reflections, then why did you raise gi samples to 36? Try with lower gi samples (you can even go down to 8 or so just to check) and see if the gi quality will be good enough after more passes.
I am trying to understand what I am doing and the logic behind is that the reflection noise is more part of gi then the lighting, also is the material. I eliminate the bump and any possible noise generators from that so rising gi should help eliminating noise caused by insufficient samples for the cornices. Or this is an " AA " noise? I will have another sample with lower samples but then I should rise LSM to kinda 8 to balance insufficient light samples, shouldn’t I?
I am not sure what is causing noise in your scene.
About sampling/time/passes/quality, maybe this will help:
https://coronarenderer.freshdesk.com/solution/articles/5000518064-how-many-passes-is-enough-
So basically it may be worth checking if you need many gi samples * little passes or little gi samples * many passes.
" light map in the materials setups. What that means? having light map in the gold shader? I got a corona normal tex in the bump slot but on the door I only have a yellow reflection and no diffuse and no bump at all."
Sorry for that, it was a wrong phrasing…I don’t know why I wrote “light”, but..anyway…I meant if you use any bitmap in the reflection and glossines slot.
Hows about the albedo pass? Is there any red colored ?
? Did you tried to build up ( lower values to higher values )the reflection in the material ? Darker value in the reflection slot ( the color brightness under 200 value ) with lower glossinsess ?
If the render setup not solving the problem, than you have to search in the material setup. I think.
Thanks a lot The Albedo pass is black and white not even pink I used to use 8/2 150 passes 1 hour 15 min reflection are a bit better but the gi is messing the picture. 16/4 30 min 58 passes not bad but still needs playing It is always about balance but the problem is I kinda not understand the ink between settings instead of vray and how they work together - the principle behind this how corona works. In vray is simple - once you understand how DMC and AA works together there is only one problem - computer power. I am trying to understand the fundamentals of Corona. Still a way to play but I got rid of the nasty flakes - here is the last result 20/4 30 min 47 passes
