Marbles scene

Hey mates,

I’m pretty new to Blender and to the 3D scene… Been messing around for about 10 months now. I’ve been doing mostly low poly scenes and this is my first real attempt at photo realism.

This render took about 3,5 hours @800*600 and 2500 samples.

Any advice of how I can improve?

Evolution of the scene

Looks nice!