It would be nice if the strength of the SpecularAntiAliasing which is part of the PBR material would be adjustable. In my case it is to strong and the material does not look like shiny metal anymore (not enough contrast).
I don’t know if this is the correct place but i was playing around with this factor in the shader: Babylon.js/pbrHelperFunctions.fx at master · BabylonJS/Babylon.js · GitHub
Lowering it to 0.25 seems to be a good compromise in my case.
SpecularAntiAliasing enabled (factor 0.75)
SpecularAntiAliasing enabled (factor 0.25)