HDRI backgrounds are transparent rendered in iray server

extraneux

My HDRIs show up as transparent pixels when I render on my iray server (works fine when rendered normally). If I render to jpeg instead of a file type that allows tranparency like tif or png then that works. I tried this and it doesn't work: https://www.daz3d.com/forums/discussion/532501/iray-server-doesn-t-render-hdri-background Any other thoughts?