Ok, I've been trying this again.  I've spent time fiddling with the RDNA dome.

I don't want a background, so I tilted it up so that it was above and in front of the figure (behind the camera). Here is the screenshot from the side. The dome is 1% of it's actual size, but I reduced it to 1% so you can see how I've tilted it in order to avoid a background behind the figure when I render and save the image.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi