Cshading Shadow in toooo noise!!

[aref3dsmax]

hi.
I dont understand why my shadow for interior work have much noise
this scene worked with noise level 4
every window has skyportal

[aref3dsmax]

this my viewport

[maru]

Can you please show a rendering with no denoiser? Right now it is hard to tell what is noise, what is denoiser artifacts, and what is expected.
Maybe this can help you?
https://coronarenderer.freshdesk.com/support/solutions/articles/5000501983
https://help.c4d.corona-renderer.com/support/solutions/articles/5000516731

[aref3dsmax]

many thanks maru

this may be useful
https://coronarenderer.freshdesk.com/support/solutions/articles/5000515603

it seems caustic not working right in the scene.

in next post I show you interesting content

[aref3dsmax]

does we have a script turn off all object caustic option ? and than turn on one by one with more precision again ?

[aref3dsmax]

first unchecked emit light in corona light material for sky , halogen , loster , ...
unchecked  ies and thay are just normal corona light
delete the environment and delete the sky portal and create a blue corona light for night shading for every windows
you see noise gone...
my opinion corona need to be upgrade.