Thank you very much for your comment, I am very pleased.
Unfortunately our projects are all intended for commercial sales but above all for virtual reality, so, as you know, we have absolutely no freedom. For this reason, in order not to scare our customers, we don't use any studio technique, neither for post-production, neither for lighting.
No we don't use any kind of plugins in our pipeline, just traditional hand-made video game development techniques, even the materials. If you mean a master material for the whole scene, absolutely not. Chromium is a simple material with metalness 1, really simple, even reflections, maybe what makes you believe that there is something special is the amount of objects reflected.
Thanks for your comment, cheers