Why Blender Mesh becomes messy when imported into Salome I have created simple geometry in Blender-two concentric curved cylinders. In the edit mode, it looks okay. But when I import the STL file in Salome, a preprocessing software, the mesh become triangular and more dense. Why is this case? Anyone knows?Thanks.
I have changed the cap fill type of the cylinder to be triangle fan. It looks nicer. But the imported STL file in Salome still has some weird small redundant edges...



After I have cleaned up the mesh by merging by distance. Then the final geometry looks nice in Salome: