was this ever resolved? i just started using rhino on mac and when saving as a jpg (no transparent background options checked anywhere) it gives me a message about it needing to be a png for trans background and saves a png with white background…i want it to be a jpg like it used to be…
my workaround for white background - .jpgs:
set a custom display-mode: copy render mode, set General - Shade Setting - Color and Material to “Object’s color” (which is the Layer-Color in default settings.