Scene getting sliced in half

Alric

I'm working on a scene and I was able to render it a couple of days ago but then the next day I reloaded the scene and tried to render again.

It's like the scene was cut in half with a knife. Half will render just fine and the other half just doesn't. I don't mean two objects where one will render and the other won't but this is one object that is cut in half, and the cut doesn't follow the mesh.

I've attached two renders to illustrate.

Anyone have any ideas what's going on?

barbult

Are you using an HDRI in Render Settings with Draw Dome and Draw Ground on? Is part of your scene below 0 on the Y axis (below ground)? Iray won't render what is below ground when Draw Ground is on.