physical model effect

[dmtr]

Guys, I just came across with these beautiful renders. I really like this realistic but a bit abstract effect with MR. Looks like a bit phisical models, and I'm wondering does anyone know how to achieve similar effect.

Is it just soft indirect lighting or camera filter? Thanks for any help.

[dogragurjeet]

first image uses Depth Of Field. I think this single function if used in a correct (read over the head) amount tends to make the object in focus stand out like a small scale model. Rest of the images i think look closer to reality than a physical model.