Rhino 7 environments, help with shadow

Rendering
1

Hey, I’m just figuring out environments in Windows Rhino 7 and I cannot seem to get rid of this circular shadow around my object. Any idea what’s causing it?

Thanks in advance!

Anton

rhino
rhino1888×1016 225 KB

rhino 2
rhino 21887×1010 412 KB

2

Are you using a transparent material with IOR set? Like a glass or water material? How are you rendering, with what render engine or in what display mode?

If you shared your scene it’d be easier to help.