I am trying to print a mesh which at the moment has zero wall thickness. You can see in the screenshot that the faces are completely planar, like a paper being rolled up. So the STL is not being detected as solid. I am wondering if someone knows an easy way to convert the mesh to one which has some thickness so that it can be printed. Is there a feature in netfabb or meshlab that converts flat walls into thicker ones? Thanks!!
Try the steps here, or search for the keyword "resampling" in the forums. https://www.shapeways.com/forum/index.php?t=msg&goto=8163 &&srch=resampling#msg_8163
Get your self a copy of Viscam Mesh https://www.marcam.de/cms/viscam-mesh.84.en.html 30 day trial. Use the offset surface and the smooth triangles command. https://www.shapeways.com/model/642018/shell.html EDIT. I forgot to mention. Do not start the repair, the program will fill the open hole.