Reflective surface too noisy and many fireflies

Corona Corona for 3ds Max Help Required
1

Hello,
I’ve been struggling with this problem ever since i started using corona a year ago, mostly when i use HDRI or something else in reflection override in Render Settings, some or most of reflective surfaces like mirrors or car paint or chrome material gets too noisy and many fireflies appear even at low noise level, that picture on left noise level is around 1.8% i don’t think it that material is supposed to look like that

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Capture.JPG1028×831 96.4 KB

2

and another example of the same problem, as you can see there are a lot of fireflies in car material which is from corona material library, this problem was fixed when i unchecked reflections override in environment tab and use the original source hdri as main lighting and reflection source

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23e.jpg1180×1159 393 KB

3

This is known issue - using HDRI in reflection/refraction override may cause persistent fireflies: https://coronarenderer.freshdesk.com/support/solutions/articles/5000516180-known-bugs-and-limitations The solution is to use low dynamic range images for overrides.

4

it makes sense now, thanks for replying