There is no maximum polygon count/amount of triangles for your 3D file. However, the maximum file size of a single 3D file you can upload to the website is 100 MB. And it just happens to be that both these things are related to each other.
A file with a resolution that is too high will make your file too large and sometimes impossible for us to handle. It might also contain an extreme level of detail that 3D printers simply cannot print anyway.
For 3D printing, the most common file format is STL, which stands for standard triangle language. It means that your design will be translated into triangles in a 3D space. STL is typically not the native file format of your 3D modeling software. In its native format, your design is described as a mathematical function.
In most 3D modeling software, when exporting a file (for instance to STL) you will be asked to define the tolerance for the export. This tolerance is defined as the maximum distance between the original shape and the STL mesh you are exporting. We advise choosing 0.01 mm for a good export. Exporting with a tolerance smaller than 0.01 mm does not make sense because most 3D printers cannot print at this level of detail and your file will be unnecessarily large.
