Nice! The gizmo inputs are pretty good I also liked to add one. What I see is that you are using smaller or equal inner radius to radius, if it's intentional then it's ok.

Yep, I combined everything as a single size slider. I might experiment with a UI with more of your original controls tomorrow.

Good. The stars look inconsistent near the bounding box I think the ray directions are different

Can I use the gizmo in my notebook?

@nxrix, please do, please use anything else! Also, let me highlight the difference between orbit controls and track ball controls. I changed the scene from orbit to trackball, and the gizmos are trackball too. It feels more natural in space to me, but it is also more disorienting.