[UPDATE] This issue has been fixed
A shader that changes the way the game is rendering itself makes dark shadows in Stained glass
MC-56461
Shadows rendering in Stained glass using "Super secret settings" that changes rendering
Resolved
Fixed
2
(Unassigned)
Confirmed
Minecraft 14w21a, Minecraft 14w21b, Minecraft 14w26c
Minecraft 14w28b
Retrieved
Confirmed.