Here is environment I am working with:
Converted to USD with the latest UE connector.
Here is a rendering made with Path Tracing, 128 samples, no motion blur. average rendering time 7 min/frm:
As you can see the noise is too much. So raised the samples to 256. No motion blur. average rendering time 11 min/frm:
Still quite much noise… But before I raise the samples, is there something I could do with the most noticeable source of noise, the reflection of the two lights at the wooden panel, at low left corner?