
Build a 2D sand physics simulator in Unity 6 that uses a pixel grid, gravity and breadth first search region detection, and adds water, shape spawning, and scalable code architecture.
Unity 6.1 sand physics simulation introduces a texture-based playground where each pixel is a grain; the system drops grains down, then shifts them left or right when blocked.
Build a grid-based sand physics system in Unity by modeling cells with material type and color, updating a texture, and releasing a center grain to create a sand fountain.
Build a falling sand simulation in Unity by placing sand grains on a grid via mouse input, converting world to grid coordinates, and applying random sand colors with bounds checks.
Create a Unity shape manager that converts atlas sprites into grid cell shapes by extracting texture data and mapping non-transparent pixels to sand cells.
Spawn a random shape on click by turning the shape manager into a singleton, pick a random shape and color, and drop it at grid coordinates with bounds checks.
Fixes a sand-physics bias where grains on the right fall faster by alternating the scan direction each frame in a Unity sand simulation, ensuring even falling regardless of side.
Learn to create shape slots as bottom containers, spawn shape holder prefabs in Unity 6, populate them with random shapes and colors, and render them as sprites from textures.
Learn to build an input manager in Unity that uses 2D raycasts and a shape holder layer mask to drag and place shapes with smoothly lerped movement.
Drop shape holders in a Unity sand simulation by handling mouse up, validating drop with a y threshold and occupancy, converting to grid coords, and triggering a shape dropped event.
Clamp the shape position in a unity sand physics simulation to keep drops within texture bounds, implement can drop checks, and manage shape spawning and pickup scaling.
Implement a color match algorithm that detects regions linking the right and left edges of a texture using a BFS flood fill with color tolerance, enabling the sand simulation.
Spawn shapes at the bottom right with the same hue but varied saturation and value using HSV conversions, and speed up updates with hue-based color checks.
Hey Guys,
Welcome to the Ultimate Journey into the creation of a 2D Sand Physics Simulation in Unity 6!
If you’ve ever played those addictive falling sand games, or simply want to create your own Sandbox Simulator with Custom Physics, or even take the source code to experiment with it, you're at the right place !
In this course, we’re going to embark on a Thrilling Adventure through the Fundamental Mechanics of sand simulation games. This, will drastically improve your Unity & coding skills.
First off, you will learn how to create a Pixel Grid World, where every cell matters. This is the beating heart of our simulation.
Once that’s ready, we can start having fun!
You will learn how to create Falling Sand Particles, completely custom, without using Unity’s physics engine.
We will add Gravity & Movement Rules so that sand flows naturally, just like in real life.
You will discover how to Detect Connected Regions using Breadth-First Search (BFS), so that entire shapes and chunks behave as one.
We will generate Random Shapes with Colors, and drop them into the world, just like puzzle pieces.
And if you guys are hyped, we can simulate Water, which flows, splashes, and interacts with sand in mesmerizing ways.
But that’s not all…
We’ll go deeper into Code Architecture so that your simulation is solid and easy to expand. You won’t just throw scripts everywhere — you’ll learn how to structure your project like a pro, making your engine scalable for future projects.
Along the way, you’ll master essential Game Dev Concepts like:
Efficient Texture Updates (so your simulation runs smoothly, we can still improve that further btw ;))
Shape Spawning & Collision Detection
Custom Managers to control the flow of the simulation
Best Coding Practices (so you don’t end up with spaghetti code)
And of course, we’ll add the finishing touches that make it satisfying and addictive:
Smooth Input handling
Saturation & Value variation for our shapes
Faster falling sand
Symmetric Falling Sand implementation
All along the way, I’ll give you Tips & Tricks that will help you code faster, smarter, and in a way that makes game dev way more enjoyable.
So… Are you ready to level up your Unity skills and create an Exceptional 2D Sand Physics Simulation that you can play, expand, and even publish?
Join me in this exciting journey, and Enroll now!