Strange artifacts on render with corona 1,7

[denisgo22]

I have some strange artifacts on render,looking like an error in calculating lighting with 1.7 version///
With denoise filter or without, the result is the same:(
With geometry in model always OK///
Smoothing modifier don't help at all///
 a problem not with HDR background,--- this in 16K resolution, and exellent quality/,besides with default white of Corona background i get the same result/
but without Corona Lights in windows i don't get this artifacts///
How about values should be used in light samples multiplier for solutions to this problem?



Corona 1.7/max2017

[maru]

Hi, this looks like a typical problem with the new light solver. Do you have it enabled or disabled in the Performance tab? Disabling it should get rid of this problem.

It would be also very helpful for us if you could send us a scene where this is happening (or just a part of it, provided that the problem is still visible). You can use this uploader for this: https://corona-renderer.com/upload