Using intels open-image-denoise C++ library for post-processing denoising

Normal maps works even on refraction/reflection

100 max bounce, Russian roulette on third sample, 64 - 256 spp using adapative antialiasing

3 bounce, 64 - 256 spp using adapative antialiasing

1 bounce, 64 - 256 spp using adapative antialiasing

Emission illumination only

Caustics! Specular seems wrong on refrective sphere

This time the specular matched exactly the Viewports

Second attempt

First attempt. Visible bugs, but you need to start somewhere