Exporting problems Split models issues
When I split and save the model as a STL I get a zip file that I extract and then drag all files to Prusa Slicer and click yes to make it a multicolor single object. My problem is that my model is a Barrel with no lid and a hollow inside but when I export the file and open in Prusa Slicer the model is now solid or the open area on the inside has been filled-in, effectively ruining the model. Am I doing something wrong? Here are some pictures.