MEGABOUND THE END — SETTINGS REGISTRATION FIX 2
- Custom settings are registered using #define shader options instead of custom const declarations.
- Duplicate Aura definitions were removed from lib/Volumetric_fog.glsl; composite2.fsh owns the Aura option definitions.
- End sky, End block-light, and Wind options use identical #define declarations wherever used.
- The rendering pipeline is unchanged; this patch only fixes option registration and menu population.
- Default visual values are preserved.
