OptiFine 1.17.1_HD_U_G9

 - fixed custom loading screens (#6128)

 - fixed player armor with arabic locale (#5806)

 - fixed crash with VoxelMap

 - fixed integrated server lag when leveling up a cartographer (#6044)

 - removed fallback to OpenGL compatibility profile

 - fixed render regions to work in core profile

 - fixed splash text for 1.17

 - updated Forge patches 37.0.25

 - fixed OpenGL error 1282 when activating AF

 - fixed shaders crash on AMD

 - added custom sky for the end dimension

 - fixed AA/AF to work in core profile

 - fixed spyglass when Dynamic FOV is off

 - fixed shaders compatibility to move #extension lines to header

 - fixed sorting of compatibility header lines

 - fixed black items/entities on Mac with shaders

 - fixed FXAA to use core profile

 - fixed shaders startup on Mac

 - fixed shaders compatibility: texelFetch2D, #version XYZ compatibility, texture2DGrad

 - fixed shaders inverse matrices

 - added modelViewMatrixInverse and projectionMatrixInverse

 - insert shaders compatibility lines after last "#extension"

 - fixed compatibility mode for shaders using reserved keywords

 - fixed compatibility mode for geometry shaders

 - updated shaders to use core profile functions

 - fixed shaders composite matrices

 - renamed shaders sampler "texture" to "gtexture" (#5537)

 - fixed shaders compatibility to work in core profile (MacOS)

 - fixed shaders rendering of boat in water

 - fixed shader loading performance

 - added prefix "va" to vanilla attribute names

 - fixed shaders horizon rendering

 - fixed chest texture in GUI with shaders

 - added powder snow support for isEyeInWater uniform (#5993)

 - fixed enchanted glint with shaders

 - fixed entity normal textures with shaders

 - fixed shaders sky color (#5960)

 - updated to 1.17.1

 - not compatible with Forge