Thank you very much for the suggestion. I have enabled the Remesh option and I have used quad instead of triangles but the result is the same as with triangles except the triangles are quads. The mesh is well quadrangulated but the quads are the result is the remeshing and when I apply the remesh to retopology I see wider quads when I am in create retopology mode but the exported mesh is the one with small quads... I don't understand what is happening. It seems the rremeshing to retopologu applies to layer on the mesh when the only thing in scene is the mesh I have created. I really appreciate your help but it seems there is a real problem on my side... Thank you very much though.