Your SketchUp model looks great. v 1.2 right? A rendered image is nothing like a SketchUp image. Part of the art of rendering, is to learn by experience to select the proper SketchUp color, then adjust the finish with Idx material finish". The sky and ground are from "Idx environment". Only way is to use a simple model, and experiment.
When I started, I used simple boxes, etc. Attached is a fun render I did with someone else's model, and a 2d face me people. The bedroom image is part of a set that sold the client on the design.
Btw, lines do not render, only faces. Use realistic textures, face me trees, and people. Find accessories on the Internet, etc. Also keep in mind that the best renders are almost always post processed (pp). If you get 70% of the way with v1.2, its easy to pp the final image.
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