Import 3d model from Sketchup to Unity with visible edges


I am working on a school project to create a board game.
I created the board on sketchup and imported it on unity. The problem is that the edges delimiting the cells aren’t visible on unity, and I don’t know how to fix it. Could someone help me?

in Sketchup :

In Unity :

Thanks in advance.

Hi @tavtav. You have to add those edges directly on the texture, you can use the UV layout for that. I don’t use sketch up but I assume those edges are the mesh itself.