OptiFine 1.16.4_HD_U_G6

 - added system property "frame.time" to show frame time instead of FPS

 - fixed cape downloads blocking skin and terrain downloads (#4976)

 - added support for shaders texture format LabPBR (#5182)

 - fixed custom uniforms using biomes

 - optimized antialiasing and anisotropic filtering (prepare)

 - optimized antialiasing and anisotropic filtering (multidraw)

 - fixed shaders normal/specular textures with anisotropic filtering

 - fixed item rendering with shaders and anisotropic filtering

 - fixed banners, enchanted items, fire and hand outline with AA/AF

 - disabled antialiasing with fabulous graphics

 - enabled anisotropic filtering with shaders

 - fixed item frames with AA/AF

 - fixed antialiasing and anisotropic filtering (#5153)

 - fixed crash when when swamp biome isn't registered (#5088)

 - fixed player items (santa hat) showing on invisible players (#5150)

 - fixed shaders breaking biome mods (#4880)

 - fixed custom gui chest type (#5100)

 - compatible with Forge 35.1.36