Gravity Mod

A realistic cave-in, support, stress, and earthquake physics mod for Minecraft Forge 1.20.1.

Gravity Mod transforms the world into a dynamic environment where caves weaken over time, unsupported structures can fail, earthquakes shake the land, and every block has physical stability properties that determine how safely it can exist.

Built to feel immersive, configurable, and compatible with large modpacks.

Main Features

Dynamic Structural Physics

Unsupported blocks can collapse naturally.
Floating structures become unstable over time.
Cave ceilings can weaken and cave in.
Surface terrain can erode and fail under stress.
Stress spreads through nearby blocks during collapses.

Per-Block Stress System (v1.00.0)

Every block now has its own:

support range
stress capacity
collapse threshold

This includes:

vanilla blocks
modded building blocks
terrain blocks
decorative blocks

The system can also be disabled to use an older material-based behavior.

Earthquakes

Natural Earthquake Events

Random earthquakes can occur naturally.
Quakes vary in:
- strength
- duration
- collapse intensity
Stress and cave-ins increase temporarily during earthquakes.

Dimension-Specific Behavior

Overworld

Larger and more destructive earthquakes.
Longer-lasting seismic events.
Major cave collapses possible underground.

Nether

Frequent but weaker earthquakes.
Shorter quake duration.
Reduced collapse damage.
Nether mobs ignore Nether earthquakes.

End

Gravity Mod mechanics are disabled entirely in The End.

Stress & Weakening System

Blocks slowly accumulate stress from:

unsupported weight
nearby collapses
earthquakes
environmental weakening
repeated structural strain

Structures become less stable over time instead of instantly collapsing.

Inspection & Analysis Tools (Currently in Progress)

Stress Profile Inspector

Inspect any block to view:

support range
stress thresholds
current stress
collapse risk
stability state
compatibility protection status

Includes a dedicated in-game UI.

Stability Scanner

Scan nearby structures and visualize instability using colored overlays:

Green → stable
Yellow → stressed
Orange → unstable
Red → near collapse

Useful for identifying dangerous structures before they fail.

Mob Reactions

Many mobs react dynamically to earthquakes:

Villagers panic and flee.
Human-like mobs visibly react to danger.
Nearby creatures scatter during strong seismic activity.

Mod Compatibility

Designed for large Forge modpacks.

Compatible with many popular mods and modded blocks, including:

Create
Valkyrien Skies
Clockwork
Eureka
MineColonies
Dynamic Trees
Tinkers’ Construct
and many more

Configurable

Almost every system can be customized:

collapse chance
support range
stress buildup
earthquake frequency
earthquake strength
cave-in intensity
mob reactions
performance behavior
visual effects
per-block profile scaling

Performance Focused

Gravity Mod includes multiple optimization systems to reduce lag:

queued collapse processing
underground activity limiting
surface-aware collapse throttling
stress batching
configurable collapse limits

Designed to remain usable even in large worlds and modpacks.

Intended Experience

Gravity Mod is designed to make Minecraft feel:

heavier
more dangerous
more immersive
more alive

Massive caves become risky.
Mining carelessly has consequences.
Earthquakes create tension.
Large unsupported builds require planning.

The world is no longer perfectly stable.