The universe_ring fragment shader adapts "The Universe Within" (2018)
by Martijn Steinrucken, also known as BigWings / The Art of Code.
Original author contact: countfrolic@gmail.com; Twitter: @The_ArtOfCode.
Original source: The Universe Within by BigWings (2018), supplied for this adaptation.
Tutorial supplied with the original source: https://youtu.be/3CycKKJiwis

Original and adapted shader: Creative Commons Attribution-NonCommercial-
ShareAlike 3.0 Unported (CC BY-NC-SA 3.0).
License: https://creativecommons.org/licenses/by-nc-sa/3.0/
License text: https://creativecommons.org/licenses/by-nc-sa/3.0/legalcode

BloodSeeker adaptations: GLSL 150 vertex/fragment integration, entity-centered
annular geometry, four independently rotating rings, crimson/scarlet/ruby
palette, local game/system/microphone audio bands, transparent edges, safe
line-distance and sparkle denominators, defined descending smoothstep,
continuous playback without the original intro/outro fade, and scene-depth
occlusion for shader-pack post-compositing.

This license applies to the adapted shader, not to unrelated project code.
It is an exception to the project's general license. Commercial use is not
permitted by this shader's license without separate permission from its author.
