Texture Resolution Guide — How Big Should Your Textures Be?
Bigger textures aren't always better. Choosing the wrong resolution wastes GPU memory, increases load times, and can tank your game's performance — without any visible quality improvement. This guide explains how to choose the right texture size for every type of asset, on every platform.
Why Textures Must Be Power-of-Two
Before anything else: game textures must always have power-of-two dimensions. That means your texture width and height must each be one of these values: 64, 128, 256, 512, 1024, 2048, 4096, or 8192. Textures don't have to be square — a 1024×512 or 2048×1024 texture is perfectly valid — but each dimension must be a power of two.
This requirement exists because GPUs use a technique called mipmapping to handle textures at different distances. When an object is far from the camera, the engine switches to a smaller, pre-generated version of the texture to avoid aliasing artifacts. The mipmap chain is generated by repeatedly halving the texture — 2048 → 1024 → 512 → 256 → 128 → 64 → 32 → 16 → 8 → 4 → 2 → 1. This only works cleanly when dimensions are powers of two.
Understanding Texel Density
The right texture resolution depends on how close the player gets to the asset and how large the asset is in the world. The concept that ties these together is texel density — the number of texture pixels (texels) per unit of real-world surface area.
If texel density is too low, the texture looks blurry up close. If it's too high, you're wasting GPU memory on detail that can't even be seen on screen. The goal is to match your texel density to what the player can actually perceive at typical viewing distances.
Too low texel density
The texture looks visibly blurry when the player approaches. You can see individual pixels. The asset looks unpolished and out of place next to higher-resolution assets.
Too high texel density
The texture looks sharp but uses far more GPU memory than needed. At typical viewing distances the extra resolution is invisible. Memory budget is wasted.
A common starting target for AAA games is 1024 texels per meter for hero assets. Indie and mobile games often use 256–512 texels per meter. Pick a consistent density target for your project and stick to it — consistency across all assets is more important than chasing maximum resolution on individual pieces.
Choosing the Right Resolution
Here are the four most common texture resolutions and what each is best suited for:
For most indie and mid-tier projects, 2048×2048 (2K) is the sweet spot for hero assets. It provides excellent quality at a reasonable memory cost and is well within the comfortable range for all current-gen platforms. 512 and 1024 cover the majority of secondary and background assets.
Resolution Limits by Platform
Every platform has hardware limits on maximum texture size, and practical limits well below the hardware maximum due to memory constraints. Always design for your target platform from the start.
| Platform | Max Texture Size | Practical Limit | Typical Hero Asset |
|---|---|---|---|
| Mobile (iOS/Android) | 4096 × 4096 | 1024 × 1024 | 512 – 1024 |
| Nintendo Switch | 4096 × 4096 | 1024 – 2048 | 512 – 1024 |
| PS4 / Xbox One | 4096 × 4096 | 2048 × 2048 | 1024 – 2048 |
| PS5 / Xbox Series X | 8192 × 8192 | 4096 × 4096 | 2048 – 4096 |
| PC (mid-range) | 8192 × 8192 | 4096 × 4096 | 2048 – 4096 |
| PC (high-end) | 16384 × 16384 | 4096 – 8192 | 2048 – 4096 |
| WebGL / Browser games | 4096 × 4096 | 1024 – 2048 | 512 – 1024 |
Memory Cost of Textures
Texture memory adds up fast. A single uncompressed 4K texture takes 64MB of GPU memory. Understanding the memory cost of your textures helps you make smarter budget decisions and avoid running into performance problems late in development.
| Resolution | Uncompressed (RGBA) | DXT/BC compressed | With mipmaps |
|---|---|---|---|
| 256 × 256 | 0.25 MB | ~0.08 MB | ~0.1 MB |
| 512 × 512 | 1 MB | ~0.33 MB | ~0.44 MB |
| 1024 × 1024 | 4 MB | ~1.33 MB | ~1.77 MB |
| 2048 × 2048 | 16 MB | ~5.33 MB | ~7 MB |
| 4096 × 4096 | 64 MB | ~21 MB | ~28 MB |
The key takeaway: always enable texture compression in your engine. DXT/BC compression (or ETC/ASTC on mobile) reduces memory usage by 4–8x with minimal visible quality loss. Most engines apply compression automatically when you import textures — just make sure it's enabled and set to the right format for your platform.
Texture atlases
Packing multiple small assets into a single texture (a texture atlas) reduces draw calls and often makes better use of texture resolution than separate textures per asset.
Texture streaming
Modern engines (Unity, Unreal) stream texture mip levels in and out of memory based on camera distance. This allows larger textures without requiring them all in memory simultaneously.
Setting Texture Resolution in Trumble
When you create a new texture document in Trumble, you choose the output resolution up front. This determines the resolution of all the maps you paint and bake. You can change it later, but it's best to decide early so your brushwork is at the right density from the start.
The resolution you paint at in Trumble directly sets the output texture size. Paint at 2048 if you want 2048 output maps.
Set bake resolution in the Bake tool independently. Baking at 4096 and painting at 2048 is a valid workflow for high-quality results.
Trumble exports each channel map at your chosen document resolution. Export presets handle format requirements per engine automatically.
A good general workflow: bake at 4096 for maximum bake quality, then export at 2048 for the final maps. The high-resolution bake captures fine detail from your high poly that will still read well when downsampled to 2K for export.