Thanks you guys ! Here are some screenshot of the project :
Also here you have simple setting for this kind of work :
Tone mapp linear 1 / auto disable
Sky + sun (make sure they are not linked for easy tune) instead of HDRi (Most of the time HDRi requiert more computational power)
Use shader Albedo below 0.8
with sun power >>> 0.0001 / sky 0.0002 you can use a clamp value of 10.
(pathocl) Sobol + Log power : diffuse ray 6/ glossy ray 6/ specular ray 12 / max ray 12
Denoiser settings :
Try theses one :
HDT >>>> 0.7
SW >>>>> 8
Scales >>> 4
PR >>>>>> 1
Switch to Path Ocl and adaptive sampling to 0.95
Switch to Filmic