February
February 25, 2026
If you’ve ever written clean C# code in Unity and thought, “I wish this ran as fast as C++,” the Burst Compiler is Unity’s answer to […]
February 25, 2026
Most games play audio files. Procedural audio generates sound in real time. Instead of pressing play on a recorded explosion or footstep, the sound is created […]
February 25, 2026
Choosing between an orthographic and a perspective camera seems like a small decision. It isn’t. Your camera type affects how your world feels, how players judge […]
February 25, 2026
If you’ve ever built enemy AI that suddenly starts behaving strangely, switching actions randomly or getting stuck between behaviors, you’ve probably needed a clearer structure. That […]
February 25, 2026
Ever notice how the music fades slightly when a character starts talking in a game? Or how background ambience lowers during an explosion so the impact […]
February 24, 2026
Sometimes a static camera just isn’t enough. You want the camera to glide through a hallway. Circle around a character during dialogue. Follow a racing car […]
February 24, 2026
There’s a simple trick that makes a game world feel deeper than it really is. Move the background slower than the foreground. That’s parallax. In 2D […]
February 24, 2026
Nothing sells impact like a good camera shake. An explosion goes off. The ground trembles. The player lands from a high jump. The screen shakes for […]
February 24, 2026
There’s something satisfying about watching a flat, boring plane turn into a mountain range. That’s exactly what a height map does in Unity. With a simple […]
February 24, 2026
![There’s something satisfying about watching a flat, boring plane turn into a mountain range. That’s exactly what a height map does in Unity. With a simple grayscale image, you can shape landscapes, add depth to materials, and create worlds that feel real instead of flat. It’s one of those tools that looks technical at first, but once you understand it, it becomes surprisingly simple and powerful. In this guide, we’ll break down what a height map is, how it works in Unity, how to use it for terrain, how it differs from normal maps, and how to control it with C#. What Is a Height Map? A height map is a grayscale image where each pixel represents elevation. Black = lowest height White = highest height Gray = values in between Think of it like a topographic map, but simplified into brightness levels. Unity reads this image and uses the brightness values to push parts of a surface up or down. The result? Hills, valleys, cliffs, and surface details created from a simple image. Height Maps in Unity Terrain The most common use of height maps in Unity is terrain generation. Unity’s Terrain system allows you to import a height map and automatically generate a 3D landscape from it. How to Import a Height Map into Terrain Create a Terrain: GameObject → 3D Object → Terrain Select the Terrain object. Open the Terrain Inspector. Choose Import Raw under the heightmap settings. Select your grayscale RAW file. Once imported, Unity converts the grayscale values into elevation data. If your height map is smooth, you’ll get rolling hills. If it has sharp contrast, you’ll get steep cliffs. Height Map Resolution Matters Resolution affects how detailed your terrain will be. A low-resolution height map creates blocky terrain. A high-resolution height map creates smoother, more detailed landscapes. However, higher resolution also increases memory usage and processing cost. If you're building for mobile, balance detail with performance. Height Maps vs Normal Maps This is where many beginners get confused. Height Map Actually changes geometry (in terrain or displacement). Creates real depth. More performance cost if geometry changes. Normal Map Does NOT change geometry. Fakes lighting to simulate bumps. Much cheaper performance-wise. If you need real terrain shape, use a height map. If you just want surface detail like cracks or scratches, a normal map is usually better. Using Height Maps in Materials (Parallax & Displacement) Height maps are not limited to terrain. You can also use them in materials. In Unity’s Standard Shader (or URP/HDRP equivalents), height maps can be used for: Parallax Mapping – creates depth illusion without changing geometry. Displacement Mapping – actually modifies mesh vertices (HDRP). For example, if you apply a brick texture, adding a height map can make the mortar appear recessed and bricks raised. Creating Height Maps You can create height maps using: Photoshop or GIMP (grayscale images) Blender (baked displacement maps) World Machine or Gaea (terrain generation tools) Procedural generation with code The key is keeping it grayscale and avoiding compression artifacts. Generating a Height Map with Code You can also generate terrain procedurally using Perlin Noise. This is common in open-world or survival games. Here’s a simple example: [csharp] using UnityEngine; public class TerrainGenerator : MonoBehaviour { public Terrain terrain; public int depth = 20; public int width = 256; public int height = 256; public float scale = 20f; void Start() { terrain.terrainData = GenerateTerrain(terrain.terrainData); } TerrainData GenerateTerrain(TerrainData terrainData) { terrainData.heightmapResolution = width + 1; terrainData.size = new Vector3(width, depth, height); terrainData.SetHeights(0, 0, GenerateHeights()); return terrainData; } float[,] GenerateHeights() { float[,] heights = new float[width, height]; for (int x = 0; x < width; x++) { for (int y = 0; y < height; y++) { heights[x, y] = Mathf.PerlinNoise(x / scale, y / scale); } } return heights; } } [/csharp] This script generates a terrain using Perlin Noise, which creates natural-looking hills and variation. Controlling Height Strength Sometimes height maps look too extreme. Other times they look flat. In terrain settings, you can adjust: Terrain height (Y scale) Brush strength (when sculpting manually) In materials, you can adjust height intensity inside the shader settings. Small adjustments make a big difference. Subtle depth often looks more realistic than exaggerated displacement. Common Problems and Fixes Terrain Looks Blocky Increase heightmap resolution or smooth the terrain. Edges Look Stretched Make sure your height map is square and uses proper dimensions (like 512x512 or 1024x1024). Lighting Looks Strange Check your normal settings and ensure lighting is baked or set correctly. When to Use Height Maps Use height maps when: You need large landscapes. You want realistic terrain shaping. You’re building procedural worlds. You need true geometric depth. Skip them when: You only need small surface detail. Performance is extremely limited. Final Thoughts Height maps are one of those tools that feel technical at first, but once you use them, they become creative tools. You’re not just editing numbers. You’re sculpting mountains. Carving valleys. Designing the shape of a world. Start simple. Import a grayscale image. Adjust the scale. Play with noise. Watch how small changes affect the landscape. Once you understand height maps, Unity stops feeling like a flat engine. It starts feeling like a world builder.](https://unityqueen.com/wp-content/uploads/2026/02/Lighting-in-Unity.jpg)
Lighting can make or break your game. You can have detailed models and sharp textures, but without good lighting, everything feels flat. On the other hand, […]
February 23, 2026
When working with character animation in Unity, one important decision affects movement, gameplay feel, and control systems: should you use Root Motion or In-Place animations? Both […]
February 23, 2026
Unity’s rendering system has evolved significantly over the years. Instead of relying only on the built-in render pipeline, Unity now offers the Scriptable Render Pipeline (SRP), […]