Thanks for the reply. been waiting all day for someone to try and solve this with me :p

Yeah ive been playing around with the fresnel, and according to solidangle (https://support.solidangle.com/display/AFMUG/Specular) fresnel should do the trick, but in my case it doesnt. i belive the refraction might have something to do with this...

Is there any way to get a good render with mixed renderers? I think i ran across someone saying that they like to render some parts of their scene with mental ray and some parts with arnold, but that seems crazy to me ... or is this a thing?

Also, i dont know why i didnt have max spec value + white map on at the moment of taking the screenshot :o