This happens when the elevation scene in SketchUp is created using the Position Camera Tool instead creating section plane and the viewport in Layout render as vector.
I’ll tray to illustrate the problem in a simple L shape kitchen with Island model (no wall, no floor, no ceiling…),
I used this workflow to setup Scene 1:
- Set camera to parallel,
- Select standard view to Top,
- Place Position Camera tool in some point between the island and the back part of the kitchen, then hold and drag the cursor toward the back part of the kitchen in the green direction (TOP VIEW SCENE4).
- When the elevation viewport is render in raster mode the result image is as expected (RASTER SCENE 1), but this no happen vector mode because the island geometry shows in the elevation (VECTOR SCENE1).