I have a building with a lot of glass, when i render i get this.enter image description here

The reflection on the glass its awfull.

I have a proper HDRI, and tried to just place lights and same result. Some idea?

  • $\begingroup$ increase transparency bounces. i.stack.imgur.com/PyXnE.png $\endgroup$ – user1853 May 8 '18 at 11:32
  • $\begingroup$ Also note that glass needs to be thin sheet to look realistic, not a huge solid block. $\endgroup$ – kheetor May 8 '18 at 11:48
  • $\begingroup$ @cegaton While that question is pertinent to the question, the question is asking about the glass reflection, which that doesn't help with. $\endgroup$ – Scott Milner May 9 '18 at 0:13

The reflection on the glass is awful because you don't have it enabled. Turn up the Specular parameter and adjust the Roughness to get the desired effect:

enter image description here

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