Physically-accurate black holes for Minecraft.

Souls Holes drops real general-relativity black holes into your world. No hand-wavy particle effects — actual Schwarzschild geometry, blackbody-radiating accretion disks, relativistic jets, and gravitational lensing of the world behind them.

Features

Real general relativity

Schwarzschild metric drives the event horizon, photon sphere (1.5 Rs), ISCO (6 Rs), and shadow at the critical impact parameter b_crit ≈ 2.598 Rs.
Gravitational pull uses the actual Newtonian limit of GR — falloff, escape velocity, and tidal spaghettification all scale correctly with the Schwarzschild radius.
Hawking radiation is computed but, like in reality, vanishingly slow.

Shakura–Sunyaev accretion disk
Temperature profile T(r) ∝ r^(-3/4) integrated into a real Planck blackbody color at every radius.
Doppler beaming brightens the approaching limb and dims the receding one.
Gravitational redshift dims the inner disk near the ISCO.
Disk truncates at the ISCO and rotates with Keplerian orbital periods.

Relativistic jets
Twin polar jets along the spin axis with realistic synchrotron coloring and length scaling.

Gravitational lensing (GLSL post-process)
Full-screen shader that warps the world behind the black hole using the two-term Schwarzschild deflection (weak-field 2Rs/b plus the Darwin strong-field log divergence near the photon sphere).
Renders the photon ring at b_crit, secondary ring at higher orbit count, and tangential light wrap so jets visibly curve around the shadow.
Up to 8 black holes lensed simultaneously.
Minecraftify mode swaps the entire lensing field (shadow, photon ring, deflection) to Chebyshev geometry — every black hole becomes a perfect blocky cube of darkness.

World content
Void Ore generates rarely in three bedrock layers (deepslate floor, world bottom, build-height ceiling). Drops Void Shards.
Bedrock shards drop occasionally when mining bedrock.
Black holes naturally seed one permanent Schwarzschild test BH per world in the Overworld and one in the End.
Void Ore generation is boosted within 100 blocks of any black hole.

Items
Black Hole Spawner — Rs = 3 blocks. The standard test article.
Tiny Black Hole Spawner — Rs ≈ 0.5 blocks. For controlled experiments.
Quantum Grounder — late-game tool.
Unknown Beacon — late-game.
Void Shard — crafting reagent.

Commands
/soulsholes spawn [radius] — spawn a black hole at the targeted location with a custom Schwarzschild radius.

Configurable

Lensing strength, max lensed BHs, accretion disk toggle, Minecraftify mode, gravity multipliers, and more — all in soulsholes-common.toml.

Warnings
The lensing shader requires OpenGL 3.2 (Minecraft's standard). Disable via config if your GPU melts.

Credits

Built by Soul. Physics from Schwarzschild (1916), Shakura & Sunyaev (1973), Darwin (1959), and a lot of Wikipedia.

Soul's Black Holes