hence the drawing showing the relationship between the sun, the dome and how the sunset effect is achieved may not be true. we have a responsibility not to provide false information.
I'm not sure I totally follow the dome refraction explanation of a sunset.
Even if it's not totally true, could you provide a best guess of the drawing? Just as a model. It's clear you have something in mind, and a drawing would really help clear it up. You don't have to claim that it's 100% accurate, it's fine for it to be just a crude sketch of what you're thinking of.