smooth geometry/normals - shader

What shader type would I need to smooth the normals/geometry of a mesh. In the image, the white duct in the background is at a much lower resolution but was exported with tangents and binormals, but is twice the size because of it. The one in the for ground has the default paralex-diffuse shader applied, but it didn’t do what I was hoping. I’m looking for a shader that will reproduce the smoothing. Thanks.

The smoothing seems to not have been transfered properly from your modeling package. You can try changing the import settings of the model to use Normals = Calculate with an angle of1 80 or so, that should smooth the normals of your mesh real good.

in order for it to smooth the normals I need to export it with ‘tangents and Binormals’ enabled with doubled the size on my mesh. I guess that’s not terrible. Would it effect performance in any way other than load time? What shader type would I use to reproduce that smoothness? Thank you.

The smoothness is usually not dependent on the shader, as long as it uses the mesh normals, which almost all of the default unity shaders do.
When it comes to unity, that sort of smoothness is almost entirely dependent on the mesh.