When designing lattice structures for 3D printing, you should know which technology you will be using to produce your design. Different technologies have different requirements. Technologies like FDM and DMLS require a support structure below certain angles. Be aware which areas of your design are connected or lose and what this means for the production process as well as the resulting part stability. Be aware of the minimal thickness of the used technology and material and when exporting to a STL-file, always use a higher triangulation resolution than the used process. Your service provider or manufacturer can inform you about the required minimal resolution.