A little history: I downloaded a boat model from Sketchup warehouse. I edited it somewhat by removing the deck house, and a few other deletions. It prints fine with Cura. I don’t know how the model was created but there were no problems with the download. The model is meshed with triangles. Lots of them.
The problem is that I cannot get anything to print inside the model. (think canoe shape). I can create objects with Sketchup which print fine by themselves, but when placed in the model they won’t print, except for any portion which is outside the model envelope either poking thru the hull or protruding out the top. Like a mast. When viewing the model in Cura, it looks fine until I look and the actual tool path, and then nothing inside.
I export everything to the printer in .stl format. There must be something going on here that I am missing or that I don’t understand.