This group is a place to discuss using Trimble SketchUp for 3D printing.
SketchUp Make can be downloaded for free here: http://www.sketchup.com/download
To get SketchUp working for 3D printing you'll likely want to start with this STL Import/Export plugin
I am having a problem with designed penetrations being printed as solid. In the 1st screengrab you will see the sketchup model. The hatched area is the base of the model to show that the holes do indedd penetrat the top layer(s). The 2nd screengrab shows the slicer output with the 4 large holes filled. Any suggestions as to why this is happening??
The model is designed so that when printed the support material will act as a diffusser.