How to fix RLCraft Lag on your Minecraft server (2024)

We've investigated RLCraft server hosting and found causes and potential solutions for some of the lag and common problems that our server owners have been experiencing. We're sharing it here for anyone playing through server hosting of any kind, to take advantage of the information and reduce their RLCraft lag as much as possible while playing.

This modpack is an example of modded Minecraft being pushed to its limits and it is likely that most server hardware (As well as home PCs) will be pushed to theirs as well. When hosting a server like this, we recommend using the best CPU options available as well as checking your chosen server hosts technical specifications. This will become more common as modders grow the potential of modpacks and modded Minecraft moves into newer versions.

Note that some of the issues you encounter are related to the server performance and others are caused by clientside mods within the modpack. We are working to fix as much as we can on RLCraft servers, but some changes will need to be implemented by the modpack developer for RLCraft to run 100% smoothly on any server.


  1. Lycanite Mobs
  2. World Generation
  3. Client Mods
  4. Disable Better Foliage

Lycanite Mobs

RLCraft uses a mod called "Lycanite Mobs" to generate new and dangerous creatures to your world. These monsters can be a real challenge to take down and provide an extra level to exploring in the modpack.

Excessive mob spawning is normally the cause for lag issues like "Ghost Blocks" and "Block Lag".

All our servers use a lower setting for Lycanite mobs that will spawn less creatures into the world. This is because, primarily on servers, a build up of mobs can begin to slow a world down and take up a lot of resources. Below is a short guide explaining the steps you can take to lower the spawning rate of these mobs and get your server running more smoothly.

How to fix RLCraft Lag on your Minecraft server (1)

  1. If you are on a server; How to use FTP Access to edit your mod configuration folder.
  2. If you are playing singleplayer; How to locate your mod configuration folder.
  3. From your configuration folder, locate the lycanitesmobs folder
  4. Within the lycanitesmobs folder, open spawning.cfg
  5. Under the global spawning section of the configuration, you will need to edit the Weight Scale modifier
  6. Adjusting this line will change the total number of spawns for Lycanite Mobs. We recommend setting it to 0.5 for server stability

# Scales the spawn weights of all mobs from this mod. For example, you can use this to quickly half the spawn rates of mobs from this mod compared to vanilla/other mod mobs by setting it to 0.5.
D:"Weight Scale"=1.0

You can further increase your server performance by repeating the process with dungeon spawns for Lycanite mobs

Follow the steps above and within the same spawning.cfg file, adjust the Dungeon Spawner Weight Scale option

# Scales the weight of dungeons using spawners from this mod. For example, you can half the chances all dungeons having spawners with mobs from this mod in them by setting this to 0.5.
D:"Dungeon Spawner Weight Scale"=1.0

World Generation

World Generation for RLCraft includes a lot of unique features generated by a few different mods, especially in Biomes o Plenty or Lost Cities setups. This can cause an error known as cascading worldgen. What this means is that a chunk is generating and some features (Such as dungeons, trees or structures) cross over into a new chunk and begin that generation too. This can create an ongoing generation of chunks that will tie up the server resources for a time.

World generation and cascading lag is often the cause for rubber-banding issues in Minecraft and the error message [21:38:49] [Server thread/WARN]: Player moved too quickly! -0.06814868588162,9.539487670704,-4.037178632121

How to fix RLCraft Lag on your Minecraft server (2)

One of the simplest ways to reduce this effect is to limit exploration but with a modpack like RLCraft, that is all part of the fun. Another option is to agree to exploration times and have all your players join in on an exploration session. Once you are done travelling, head home and then run a server restart from your Multicraft panel. While this is not the ideal situation, we are working to find better long-term solutions to the world generation issues. However, a lot of the decisions are in the hands of the modpack developer and hopefully they will be working on ways to improve the world generation in time too.

Client Mods

Alongside the server tweaks we can make, there are some client mods that can help to improve the modpack performance.

Disable Dynamic Surroundings & Chunk Animator

Dynamic Surroundings provide more detailed and varied sounds to your Minecraft game. They can however, slow down your CPU and there are known issues when the mod can not identify or play the correct noise.

Chunk Animator will make newly explored chunks swoop up into the world instead of just generating as normal. While this is a great effect, it will slow down your PC as you explore and uses advanced graphics added to the Minecraft code.

You can disable client mods in your Twitch launcher without it affecting you playing on a server following these steps:

    1. Click on Mods in your Twitch launcher

How to fix RLCraft Lag on your Minecraft server (3)

    1. Select Minecraft and your RLCraft profile

How to fix RLCraft Lag on your Minecraft server (4)

    1. Click on the settings icon to open profile options

How to fix RLCraft Lag on your Minecraft server (5)

    1. Within profile options, untick the "Locked" option

How to fix RLCraft Lag on your Minecraft server (6)

    1. To disable a mod, click on the tick button next to the mod name and it will grey out

How to fix RLCraft Lag on your Minecraft server (7)

Disable Better Foliage

Better Foliage is a mod that enhances the grass, trees and other greenery in the game. This can be a beautiful mod to play with it will drain your PCs resources drastically. Luckily, the mod has an in-game configuration that can be adjusted as you play. The following steps will go through the options that most affect your game as you play and you are free to adjust each individually until you can find a good balance.

    1. Pause Minecraft and select "Mod Options..."

How to fix RLCraft Lag on your Minecraft server (8)

    1. Organise the modlist with the "A-Z" option

How to fix RLCraft Lag on your Minecraft server (9)

    1. Once you have found "Better Foliage", click on the "Config" button to see more options

How to fix RLCraft Lag on your Minecraft server (10)

    1. From here you can disable the entire Better Foliage mod or individual components

How to fix RLCraft Lag on your Minecraft server (11)

    1. There are settings in each option that can be adjusted to match your PCs specs and capabilities.

How to fix RLCraft Lag on your Minecraft server (12)

  1. The most resource intensive options are "Round Logs", "Falling Leaves" and "Rising Souls".

StickyPiston Support

Whether you own a Server with or don’t, we are always happy to help with any technical issues you may be having. Open a support ticket with our team and we will be in touch.

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How to fix RLCraft Lag on your Minecraft server (2024)


How to reduce lag on RLCraft server? ›

Improve Your Connection to Minecraft Servers
  1. Play on a different server. ...
  2. Use a wired connection. ...
  3. Boost your signal strength. ...
  4. Connect using Intel® Killer™ Wi-Fi 6. ...
  5. Close open apps. ...
  6. Close background apps. ...
  7. Reduce network traffic. ...
  8. Update your router's firmware.

Why is RLCraft so choppy? ›

RLCraft uses a mod called "Lycanite Mobs" to generate new and dangerous creatures to your world. These monsters can be a real challenge to take down and provide an extra level to exploring in the modpack. Excessive mob spawning is normally the cause for lag issues like "Ghost Blocks" and "Block Lag".

Why am I so laggy on my Minecraft server? ›

You have many applications running in the background using up RAM. You are playing online on a server too far from your location. You are running too many Minecraft worlds simultaneously. You have too many plugins or mods installed.

How do I make my RL less laggy? ›

Optimize Your FPS Settings

First, try limiting the frame rate to just under your display's refresh rate. Attempt a higher frame rate. Second, try pushing the game to a much higher frame rate—double the monitor's refresh rate or more. This should lead to a small but noticeable improvement in input lag.

How much RAM should I allocate to Rlcraft server? ›

To avoid lag or memory errors, order a minimum of 3GB of RAM. If you are playing with friends or planning on hosting a public server consider ordering 4GB or more.

How to give RLCraft more RAM? ›

Allocating RAM in the General Settings

In the settings menu click on Minecraft under Game Specific Settings. Scroll down to find the Allocated Memory slider under the Java Settings. Move the Slider to allocate RAM. The slider is in megabytes, a gigabyte is approximately 1024 megabytes.

Is RLCraft a hard mod? ›

The new version is much more challenging and makes certain features more endgame. Those who have never played the modpack before and have no idea what they're getting themselves into will need these beginner tips for RLCraft before jumping right in.

How do I fix quality in RLCraft? ›

By placing an item in the top slot and a matching material, or a Nether Star in the bottom slot, the player can reforge the quality of the item in the top slot at the cost of the item in the bottom slot. The max qualities on each item are: Armor and Horse Armor: Masterful. Tools, Weapons, and Bows: Legendary.

How to decrease Minecraft lag? ›

Here are the most common fixes to Minecraft lag.
  1. Change Video Settings. Playing video games at HD settings can drain the juice out of your system's RAM and CPU. ...
  2. Make Java a Priority. ...
  3. Add RAM. ...
  4. Disk Cleanup/Shut down Unnecessary Apps. ...
  5. Get a Better Internet Connection. ...
  6. Update your OS and GPU Drivers. ...
  7. Use a VPN.
Jun 3, 2024

What is the least laggy server in Minecraft? ›

Hypixel and Mineplex are great servers. Actually, Hypixel is the most popular Minecraft server (only available to play on Minecraft Java Edition). Keep in mind that you won't experience any lag on any server if you have a good internet connection.

How to fix lag? ›

9 more tips to reduce lag and fix ping
  1. Close background programs and applications. ...
  2. Temporarily disable updates. ...
  3. Use an ethernet cord. ...
  4. Remove other devices from your network. ...
  5. Check the game server's ping. ...
  6. Select a gamer server closest to you. ...
  7. Adjust your frame rate. ...
  8. Upgrade your router.

How do I reduce lag on my mod server? ›

A good way to reduce lag on your server is to set from the start a radius where you want your players to explore, then use a plugin or mod to pre-generate chunks from that zone. When players go there, the game will have to load the already existing chunks instead of generating them.

How to reduce lag on a paper server? ›

You can decrease how often the inventory is refreshed, but don't go higher than 3 or 4. If your players are often found cramming mobs in small spaces, decreasing this number will reduce lag caused by cramming. By increasing this value you will reduce how often the server tries to spread grass from one block to another.

How to lag out a Minecraft server? ›

Image via Minecraft.
  1. Go to the top of your platform and lay down a row of redstone dust. This should run overtop of the corner observer block.
  2. Place a row of repeaters alongside the redstone row. ...
  3. Place another row of redstone dust and another row of repeaters. ...
  4. Flip the switch and watch your lag machine work.
Oct 11, 2022

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