Hello guys,
I'm struggling to get the light reflexion of those primitives on the wall, can you help me to achieve this effect please?

Thanks you a lot!

Try putting a principal shader in the wall with some reflection and play with the roughness. The material does not seem particularly difficult. And don't forget the lights…there are at least two lights in that scene… and area light to the right with some soft shadow and a spotlight to the left(could be a directiona light).

PS: I actually notice there is a third subtle area light on the left.

Hadn't touched mantra in a while, seemed a good excuse to do so while avoiding reality tv cooking shows…

As Nicolas said, a physically based material is one part, the rest is in the lights. People who aren't used to physically based renderers often don't know how hard you can (and should!) push the lights to get the look you're after. The key light here is pushed +11 stops, which is what causes such a strong bounce effect off the top of the graph.

Fixing fireflies if you go with even a vaguely shiny material is a whole other matter…

Oh thanks a lot for your responses ! I'm gonna try !