Target Boxes

What causes this?

Simple bucket render on one machine. Min subdivs 1 Max subdivs 25 Noise threshold .005

Is it the denoiser pass ?
I saw that with denoiser and highlights…

No, it is the RGB Color. I found out that it was reflections of some lights, which were bright.

This really looks like denoising artifacts…

Best regards,
Vlado

I dimed the lights and it went away. I’ll double check if it happens again.