The title explains it all.
It happens in all gamemodes
1.7 snapshots +
Linked issues
Comments 1
MC-38285
Super secret settings/Shaders wont work
Resolved
Duplicate
0
migrated
(Unassigned)
Unconfirmed
Minecraft 1.7.2
Retrieved
Duplicate of MC-33054 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.
As stated in MC-33054, if your graphics drivers and hardware don't support it, you can't use them.