It can effect Mob Spawning on Singleplayer-World Servers, but not on big Servers like Hypixel, etc.

Ok also do you know if mods that show a timer are allowed

Yes, they are allowed if they are accurate. If they aren't, and the timer has a deviancy, then it's pretty much cheating.

Can I use optifine if I’m on a server?

Maccysundae

SpedWill

ArticianSR

Minecraft: Java Edition

Gran5364

Keima

TonyKing

VEP33

emilemarc

1.2.1

1.2.2

1.2.3

1.2.4

1.2.5

1.3.1

1.3.2

1.4.2

1.4.4

1.4.5

1.4.6

1.4.7

1.5.1

1.5.2

1.6.1

1.6.2

1.6.4

1.7.2

1.7.4

1.7.5

1.7.9

1.7.10

1.8.1 Easy

Normal

Hard

Hardcore

1.8.2

1.8.3

1.8.4

1.8.5

1.8.6

1.8.7

1.8.8 4 Players

5-9 Players

10+ Players

1.8.9

1.7.6

1.7.7

1.7.8

1.9.1

1.9.2

1.9.3

1.9.4

1.10

1.11.2

1.11

1.12

1.12.1

1.12.2 2 Players

3 Players

1.7.3 Set Seed

Random Seed

1.0-1.6

1.8-1.11

No F3

1.13

1.13.1

1.13.2

1.10.2

1.14

1.14.2

1.14.3

1.14.4

1.15

1.15.1

1.15.2 Pre 1.8

1.13-1.15

Pre 1.9

1.14+

1.9-1.15

Vanilla

Version

Difficulty

Players

Seed Type (Any% Glitchless)

Version Range (AA)

Seed Type (Any%)

Seed Type

Seed Type (Any% Glitchless Peaceful)

Seed Type (AA)

Version Range (AAdv)

Seed Type (AAdv)

Version Range (Any% Glitchless)

Version Range (Any%)

Version Range (Any% RSG Co-op)

Mods

Version Range (Any% Glitchless (Peaceful))

Version Range (Any% (Peaceful))

Version Range (Any% Glitchless (Demo))

Player Count (AAdv Co-op)

Seed/Glitch (AAdv Co-op)

Version Range (AAdv Co-op)

Seed Type (Combined Any%)

Seed Type (Any% Time Travel)

Seed type (Any% Glitchless Co-op)

Splits (Combined Any%)

**Updated Legal Mods:**

• AntiResourceReload 4.0.2 for 1.14-1.15.2 is now allowed, which fixes a crash when loading the mod outside of a development environment.

• StandardSettings 1.2.3 for 1.14-1.19.2 is now allowed. This update adds an f3PauseOnWorldLoad option that, when enabled and pauseO

StandardSettings & AntiResourceReload

New and Obsolete Mods

Updated Mod Rules

Minecraft

Minecraft Speedrunning Questions Thread

Form for requesting custom map / server leaderboards

how do you get atum and speedrunigt for 1.12

Speedrun Wall on MAC

Standard Settings

Modern Practice Maps and FOV

Awesomecuber

AprilSR

skylewl

draconix

nwolc

Luminosity

Bloon

ElRichi

DrGuy

nottherealben

Winrar

DraquoDrass

Specnr

AlEmeralds

Armpitsmoothie

audioSalix

gaylea

BSRF

luvvlyjude

EvanKeen

taffel

Hayley

lazysonya

tildejustin

drip120

the_yuukster

r0hkx

regionruns

Leonn

leto_saa

Olock5

mariofan65

escaperoftheend

MooMooRuns

Deadpool

DaBias2