I am working with a very old game format and am importing the levels and character models. I have written an exporter which outputs OBJ files for the meshes. Separately, I export a list of any other data (e.g. vertex colors) that was contained in this old format. The problem I am having is that when Unity imports the model, the vertex count is greatly inflated. I checked in my exporter with a simple model and the vertex count is 1419. I loaded it into a 3d modeling program and verified that it has 1419. When I bring it into Unity, the mesh filter has ~2x as many vertices. I tried disabling all of the normal generation, and then I am getting fewer than 1419. I really need this number to match so that I can send vertex colors for each mesh and have them line up in the correct vertex. Is there any way to ensure this?