A very good 3D model (utility pole) was made by RealityCapture
[Fig.1]
In order to export this to Unity,
Press [RECONSTRUCTION]> [Texture]
(Textures will not be exported unless you do this)
Then the texture is reconstructed and the image quality drops very much.
[Fig.2]
In the state of good image quality like [Fig.1], What kind of settings should I do to export?