He kindly allowed me to try his Scene in Indigo, so here are the results:

The final Indigo output, no post work.

The final image after some color correction.

The original vRay Image by Clemens

And finaly the original advertise
The book & floor Textures are by myself, and are different from Clemens version.
The carpet was done different by us both too, but both based of Hair in C4D converted to polygons
(for my version 187500 small pyramids was generated).
The Material for the glassy Pictures is a blend between a glossy transparent mat (exponent 1)
and a diffuse Transmitter at a blend factor of 0.5.
The Lampshade material is a blend between a diffuse Transmitter and a phong...
Clemens did use some SSS for this but my experiments with SSS wasn't very successful here...