Subdivide doesn't smooth mesh


I downloaded this mesh from the internet. I am trying to smooth is as usual with SubDivide. But it’s not working. All the seperate mesh faces subdivided, but there is no smoothing.

What other options do I have to smooth this ?

Gezicht 001.3dm (457.3 KB)

clean up the mesh - especially the triangular faces. then…

you have to convert to SubD first
works as you expected

1 Like

Thanks, it worked !