Hi

I’m trying to import a building model I've made in another programme. 

In that programme all the edges are straight and the angles sharp. When I import  it as an  obj  file  into Daz studio it seems to automatically smooth the edges out and spoil the mesh. I wondered if this can be turned off.  I've looked for an option but can't seem to find one.  If not I was wondering how people keep their models from doing this as I can load models made for poser that don’t get this effect

Any advice is much appreciated

You need to either add small bevels to the corners you want to stay sharp or to split the mesh there, so that the ploygons don't share a common edge (but that will result in tearing if you apply displacement so bevelling is better).