Shaders now are managed by a manger that can do hot reloading and it also will detect a bad shader and use an ERROR shader so you know it's busted visually.

meson.build

@@ -114,6 +114,7 @@ sources = [
   'ritual_ui.cpp',
   'rituals.cpp',
   'save.cpp',
+  'shaders.cpp',
   'shiterator.hpp',
   'sound.cpp',
   'spatialmap.cpp',
@@ -145,6 +146,7 @@ executable('runtests', sources + [
   'tests/matrix.cpp',
   'tests/pathing.cpp',
   'tests/rituals.cpp',
+  'tests/shaders.cpp',
   'tests/sound.cpp',
   'tests/spatialmap.cpp',
   'tests/stats.cpp',