Minecraft: Java Edition Forum  /  OptiFine
  NeonDarknessNeonDarkness

Is OptiFine allowed?
 
  astroliteastrolite

no
 
  Eimerplayz127Eimerplayz127

you can only use it for pre 1.15. 1.15+ is banned because it changes the behavior of the vanilla game and these features are non-vanilla unlike optifine 1.14-1.0 which doesn't change it and can easily disable these features if you are using 1.14-1.0 read the rules for optifine https://docs.google.com/document/d/1A7NtP7LegD7SYjho54gQDSlJkYZlofndjw2COu00yMU/edit#heading=h.pad3nic7pyya
but if you are using 1.16+ use the mods here
https://www.minecraftspeedrunning.com/public-resources/mods
BigLadMuzzaBigLadMuzza, PoisonousSkelyPoisonousSkely and 2 others like this. 
  NeonDarknessNeonDarkness

thanks
 
  LuminaireLuminaire

1.16+ you cant
 
  TuttereyTutterey
MinecraftGamingMinecraftGaming, BigLadMuzzaBigLadMuzza and 4 others like this. 
  Speedyguy123Speedyguy123

Only if you need h to e performance enhancement like if you are using a laggy computer/pc
 
  HiggexHiggex

^ this is incorrect
BigLadMuzzaBigLadMuzza and TuttereyTutterey like this.