Bubble Column Tweaks

A Minecraft mod that allows you to customize bubble column speeds for both magma blocks and soul sand. Compatible with Fabric and Quilt.

Description

In vanilla Minecraft, soul sand creates bubble columns that push entities upward, while magma blocks create bubble columns that pull entities downward. However, the downward pull of magma blocks is slower than the upward push of soul sand. This mod makes magma blocks pull entities down at the same speed that soul sand pushes them up (by default), and allows you to customize both speeds via configuration.

Server-side only: This mod works when installed only on the server - clients do not need to install it! (clients can install if you want this in single player)

Supported Versions

• Minecraft 1.21.6 - 1.21.10

Configuration

The mod creates a configuration file at config/bubblecolumntweaks.json on first run. You can edit this file to customize bubble column speeds.

Config File Structure

{
  "magmaSpeedCap": -0.8,
  "magmaAcceleration": -0.08,
  "soulSandSpeedCap": 0.8,
  "soulSandAcceleration": 0.08,
  "magmaSurfaceSpeedCap": -1.8,
  "magmaSurfaceAcceleration": -0.1,
  "soulSandSurfaceSpeedCap": 1.8,
  "soulSandSurfaceAcceleration": 0.1
}

Configuration Options

Regular Bubble Column Effects

• magmaSpeedCap: Maximum downward speed for magma blocks (default: -0.8)
• magmaAcceleration: How fast entities accelerate downward in magma columns (default: -0.08)
• soulSandSpeedCap: Maximum upward speed for soul sand (default: 0.8)
• soulSandAcceleration: How fast entities accelerate upward in soul sand columns (default: 0.08)

Surface Effects (when entities reach the top)

• magmaSurfaceSpeedCap: Maximum downward speed at magma surface (default: -1.8)
• magmaSurfaceAcceleration: Downward acceleration at magma surface (default: -0.1)
• soulSandSurfaceSpeedCap: Maximum upward speed at soul sand surface (default: 1.8)
• soulSandSurfaceAcceleration: Upward acceleration at soul sand surface (default: 0.1)

Vanilla Values (for reference)

• Magma: speedCap = -0.3, acceleration = -0.03
• Soul Sand: speedCap = 0.7, acceleration = 0.06

How to Configure

1. Run your server/client once to generate the config file
2. Stop the server/client
3. Edit config/bubblecolumntweaks.json with your desired values
4. Restart - changes will take effect immediately

Note: Negative values pull downward, positive values push upward. Higher absolute values = faster movement.

Issues

If you encounter any bugs or have suggestions, please open an issue on the GitHub Issues page.