This little shader subtly throws the corners of blocks around a bit to give the world a more dynamic, caverny, retro-3d-style look. No more straight edges!
Minecraft 1.18+?
Works on Vanilla
Place the CavernShader folder into your resourcepack folder, located in the .minecraft folder. You can find it by pressing Resource Packs... in the game options and press Open Pack Folder. After you placed the CavernShader folder there, it should be available in the Resource Packs... list in your game.
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The cavern vertex shader runs through rendertype_cavy.vsh. Here, each point is calculated through a series of sines and cosines with random values.
vec3 Disposition = vec3(
sin(AlignedPosition.x * 1.3 - AlignedPosition.z * 0.7 + 0.0) * (0.6 + sin(AlignedPosition.y * 1.3 + 1.0)) * 0.12,
sin(AlignedPosition.x * 1.1 + AlignedPosition.z * 1.5 + 3.0) * (0.6 + cos(AlignedPosition.y * 1.5 + 0.0)) * 0.12,
cos(AlignedPosition.x * 0.7 + AlignedPosition.z * 1.4 + 7.0) * (0.6 + sin(AlignedPosition.y * 1.2 + 9.0)) * 0.12
);
You can alter these values as you see fit to get different results. Displace, amplify, or increase frequency of the waves over the x, y, and/or z axis. There is no special meaning behind this formula, it just came out right for me through trial and error.
The line above that:
vec3 AlignedPosition = mod(abs(Position), 16) * sign(Position);
Makes sure that the positions at the chunk borders always take on the same positions so they align with the next chunk.
Yes, use it as you please. No need for my permission. A credit would be kind: 'Cavern Shader made by Joozey'.