Some suggestions after this firt test:
- Improve AntiAliasing: You can notice a bad result specially in the curtain on backlight
- Improve GI in corners. Shadows lacks are often visible, specially at the corners of surfaces without textures.
- Improve AO render pass that is too little contrasted.
Thanks for the wonderfull works you ar doing. Reach this quality in 4k with my old i7 3770K + GTX 1060 6 GB, in only 9 mins, was almost impossible until now.
[Notice: There is a little post production in the image below]