Another project i work besides my current water shader. Originally i was using raymarching, but then found a simpler solution and went with that instead to reduce complexity since i dont aim for a hyper realistic effect. I intend to share this like my other projects on my gumroad for free later.
This is not a realistic blackhole, but a rough approximation. I still try to respect real properties of a blackhole so you can get some pretty immersive visuals. Currently features gravitational pull (lensing), photon sphere, event horizon + shadow. Scene is just an hdri, a sphere and a disk.
Some ressources that helped me so far:
https://science.nasa.gov/universe/black-holes/anatomy/#shadow (basic anatomy of a blackhole)
https://www.youtube.com/watch?v=wF8LBqV6Ayw (helped me understand the effects of a blackhole and also how i could build my own)
https://www.youtube.com/watch?v=egfpqMs88XE&t=614s (speed up my progress in the shader graph. Even though i use a different approach it was still useful)