If I could add a thought...... djin, are you using Sketchup for the most part? If so, you might want to take a look at the Roundcorner plugin for Sketchup, and consider using it on a regular basis for your model-building efforts. That is, create beveled edges on your models before sending them to the rendering engine.
The reason I say this is because we have pretty much moved past the point where we can put the burden of round or chamfered edges on the rendering engine. Two things have changed in the technology. First, we are able to have greater and greater pixel and color resolution in renders that expose "cheats" for what they are. Second, modern PBR materials, such as the Substance Designer materials incorporate both what we think of as the 0-reflection and the 90-reflection (glancing reflection) in the basic sampler. Now, instead of having a diffuse channel/color and a specular channel/color that indicates an edge and/or edge reflection, all this is built-into the base color channel. One practical effect of this change is that a hard edge on an object is going to be quite apparent if any of the modern PBR materials are applied to the object. A beveled/rounded edge is going to reflect light in the directions of the face normals much more clearly. Rounded edges are going to be much more clearly seen as "rounded" and they will be considerably more "photo-realistic" in a render. Maxwell Render, one of the first photo-realistic engines, is very responsive to and sensitive to modern PBR materials. Mostly, we would consider this a good thing as the combination of modern PBR materials with a great PBR rendering engine results in a significant amount of photo-realism.
But, because this is the case, low-resolution models are increasingly going to look like exactly what they are. The technology changes are exposing these in ways that can't be helped. Even in Max, architects are not getting away with hard edges any longer - and Max probably has the most powerful algorightm for messing around with polygon normals to create a seemingly rounded edge. A whole new generation of Max-using architects is supplanting the old one because architectural model-building is requiring greater, more precise model-building skills to keep up with the changes in materials and rendering technologies.
So, I think this is the hand-writing on the wall ...........