Add a "starbox" skybox render pass that interacts with a blackhole element.

[xthexder]

Some potential inspiration for generating:
Kaliset fractal based volumetric stars: https://www.shadertoy.com/view/XlfGRj
Layered star grids with random offsets, brightnesses, and temperatures: https://www.shadertoy.com/view/stBcW1

A key thing seems to be to use the black body radiation temperature to determine color. We can likely generate a few fixed skybox layers as needed, that can then be rendered and distorted based on the blackhole in realtime.