Note: Plaque exports are disabled (dimmed) by default. To enable export of .dxf and .stl files for 3D printing, you must first tesselate the plaque for export and a password for 3D printing is also required. To enable export of a plaque's 3D dose matrix a valid 3D dose matrix must first have been calculated. If the 3D Voxel item is disabled (dimmed) you must first manually allocate the voxel model in the Setup Appearance window.
You can view the .stl files that are exported from Plaque Simulator with an application such as MeshLab for MacOS.