Hello:
Although you can configure Sketchup or other 3D modeling applications to display the full resolution of texture Material images within the work-space, be aware that there are limits to the resolution of available downloaded aerial imagery mapped onto Faces of flat 3D polygon objects, which make them only practical to use for low-resolution land class scenery.
Ground Polygons (aka "G-Polys") may require one to artificially create "synthetic" high resolution texture Material images.
You may wish to consider some concepts which Pete Beeby has showcased in a few threads here at FSDeveloper forums:
https://www.google.com/search?source=hp&ei=IiE1W6LfCNHYtQWHyqLIDg&q=site:www.fsdeveloper.com+Pete+Beeby+texture&oq=site:www.fsdeveloper.com+Pete+Beeby+texture&gs_l=psy-ab.3...2494.18553.0.19130.37.31.6.0.0.0.149.2648.28j3.31.0....0...1c.1.64.psy-ab..0.5.505...0j0i131k1.0.wlscQPd5g4k
PS: Also, be aware of the fact that high resolution texture Material images mapped onto Faces of flat 3D polygon objects and compiled into G-Polys may only display at on-ground or near-ground altitudes. due to the way that the MSFS / P3D LOD display system shifts to lower resolution MIPMAPs as the distance of the user aircraft from a G-Poly increases. so there are practical limits at whch one will actually "see" sharper ground details when in-flight altitudes are in effect.
GaryGB