The PDF or EPS export function in SketchUp produces a pure vector file, with all raster graphics based effects left out, like Sketchy Edges styles, material textures, shadows and hidden lines. That is why they show in raster image exports but not in PDF. The same applies when you print to PDF or a printer using the “Use high-accuracy HLR” (“Raster printing” on a Mac) print option.
To get a vector file with hidden lines you can use LayOut with this workaround:
- in SketchUp, create two scenes with the same camera view but one
using the Hidden lines display option and the other Wireframe.
- Bring the model into LayOut and create two identical views, referring
to the SketchUp scenes.
- Align the views, with the wireframe view on top (at this stage you
can make a copy of the wireframe view outside your page for further
- Explode the wireframe view and set the linetype of the resulting
group to hidden.
- Print or export.