Texture mapping issues after importing an .scn file into Unity

[CherryJGit]

I'm using the liver2.scn file in SofaUnity. I just replaced the model, for example, with mesh/test4msh.msh, and then loaded it in Unity. When I assigned the material liver2 to it, the situation shown in the following picture occurred. Why is this? I converted the file from obj to stl and then to msh. Is there something wrong with my operation steps? I'm asking for help from everyone.

[epernod]

Same answer as here: #128 (reply in thread)

msh file do not have texture coordinates.