What Is Texture Baking? (Map Baking)

Texture baking, also called map baking, stores selected surface or lighting information in textures. A normal map can transfer details from a high-resolution model to simpler geometry. A lightmap stores precomputed lighting instead. The maps you need depend on the model and its intended use. A wooden stool and a vintage camera illustrate the relationship between a texture atlas and the rendered object.

Short and Sweet – When Is Baking Worth It?

Scenario	Potential benefit	Maps, depending on the application
Web Viewer / AR	Precompute surface or lighting calculations; choose texture sizes suited to mobile devices	Normal, AO or a lightmap for fixed lighting
Material Options	Use masks to make targeted surface changes	Curvature, ID and, where needed, AO
Low-poly assets	Show surface detail; the silhouette still depends on geometry	Normal; height only with suitable renderer support
Product Pack Shots	Prepare demanding material calculations as textures where useful	Base color, roughness or other required material channels

Examples: from texture atlas to rendered object

The color textures below show how the surfaces of a wooden stool and a camera are arranged in a UV atlas. Wood grain and lettering on the camera body can thus be assigned to the corresponding model surfaces. Normals, roughness, and lighting provide different information and may be stored in additional maps. The finished rendering combines geometry, materials, lighting, and camera settings.

Wooden stool: grain and wear

Color texture atlas with wood grain, cracks and round metal details from a wooden stool. — Color texture atlas for the wooden stool: individual UV regions contain grain and signs of wear.

Rustic four-legged wooden stool with pronounced grain and worn surfaces against a white background. — Rendering of the wooden stool. Shape, materials and lighting together determine its appearance.

Camera: different materials and signs of use

Color texture atlas for a vintage camera with black surfaces, worn gold-colored edges and controls. — Color texture atlas for the camera, including body panels, lettering and controls.

Vintage black camera with a lens, worn gold-colored edges and a brown leather strap against a white background. — Rendering of the camera with different surfaces and visible wear.

3D rendering of a bright living room with a brown leather sofa and a view of the surrounding nature through large windows

From Technical Term to Visual Experience

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View Work

Why is this relevant to marketing?

Material variants: An ID mask lets you edit wood and metal separately, for example. When only the color changes, suitable geometry maps can be reused. The new product image is then rendered with the updated material variant.
Interactive presentation: A normal map can represent fine surface details on a model with fewer polygons. In the web viewer, assess the required detail alongside texture resolution, memory use, and loading time.
Reuse: A shared material setup helps with handoffs. Lighting, shaders and color management still affect the appearance in each application.
Plan the work: Baking is particularly useful when surface data will be reused or complex material calculations can be simplified. Allow time for preparation, a test bake, and validation in the target application.

Comparing baked and dynamic lighting

Criterion	Baked lighting	Dynamic lighting
Performance	Can reduce runtime calculations; textures require memory	Depends on the method, scene, quality settings and hardware
Flexibility in Adjusting Lighting	Changes to lighting or relevant geometry may require rebaking	Lighting can respond to changes, at a runtime cost
Consistency Across Channels	Stored values stay the same; their appearance depends on the target system	Material, lighting and color settings need to suit the target
Production Costs	Preparation, baking and checking; repeat when necessary	Set up lighting and quality, then test runtime performance

Here's How Texture Baking Works

1. Apply UVs neatly

UV mapping determines which texture regions appear on which model surfaces. Overlap may be intentional for repeated or mirrored materials. Unique baked information needs suitable, often non-overlapping UV regions. Spacing between islands and edge padding help prevent visible seams. Use the seamless texture checker to inspect repeating material textures for visible joins; check UV seams on the 3D model in the renderer.

Suitable geometry is part of the preparation too. See 3D modeling.

2. High-to-low-poly transfer

A normal map transfers surface directions from a detailed model to the target geometry. It does not change the outer silhouette. AO, curvature or ID maps may support the texturing process. Our article on shaders for CGI explains how materials use this information.

3. Separate lighting from material information

A lightmap stores calculated lighting contributions. Ambient occlusion approximates how surrounding geometry occludes the environment. These are different kinds of information. Extra AO can make areas too dark when similar effects are already present in the lighting. See 3D visualization for the wider image-making process.

4. Export textures and models appropriately

Image format, resolution and channel packing depend on the target application. glTF/GLB and USDZ are 3D asset formats, not texture image formats. Check which material features survive export. A roughness map controls roughness rather than base color. Learn more about digitizing materials and surfaces.

5. Check the intended destination

Test materials, scale, lighting and loading in the intended viewer or AR application. Providing 3D assets and integrating them into an online store are separate tasks to agree on within the project. For product visualization, review also covers camera angles, visual direction and product references.

Texture Baking Checklist

Step	To-Do / Check
Preparing UVs & Low-Poly Models	Check UV layout and padding; use a compatible normal/tangent basis and consistent triangulation for tangent-space normal maps
Optimize High-Poly Models	Check the required detail and alignment with the target; simplification must preserve the features being transferred
Clear Naming Conventions	Name corresponding models clearly, such as chair_high and chair_low. Match by Name or separate bake groups help pair the correct parts.
Create a Cage	Adjust the projection range or cage; test whether rays reach the required detail or hit unrelated parts
Test Bake	Check representative areas for projection, seams, padding and the required maps
Fine-tuning	Choose resolution and bit depth for each map. Fine height gradients or HDR lighting data may benefit from greater precision; also check projection, sampling, and texture compression.
Export & PBR Setup	Check channels, color versus data interpretation, supported material features and file names
Implementation & QA	Inspect the model at relevant distances; test download size and appearance on intended devices

Quick Tips from Real-World Experience

Distorted UVs and insufficient padding can cause visible artifacts.
Load normal, roughness, and similar data maps as data rather than color photographs.
Adjust the cage and ray distances to the model parts, and test narrow gaps carefully.
Evaluate AO with the final lighting to avoid double darkening.
Use clear map and model version names, such as chair_normal_2k.png with its matching model version.

FAQ - Texture Baking

Do I need texture baking if I'm using ray tracing?

Not necessarily. Ray tracing and texture baking serve different purposes. Prepared material textures or transferred surface detail can also be useful in a ray-tracing renderer. Whether lighting should be baked depends on the application and planned changes. Further reading: ray tracing.

What are the minimum number of maps I need to bake?

There is no universal minimum. A simple material may need no baked maps. A normal map is often useful when transferring high-poly detail to a low-poly model. AO, curvature, thickness or ID maps are needed only when the material or display workflow uses them. Further reading: physically based rendering.

How can I prevent artifacts from forming during baking?

Check UVs, high-to-low-poly matching, projection distances and the settings for each map. Test a problem area first. More resolution or bit depth cannot fix incorrectly projected detail.

Is AO better rendered statically or dynamically (SSAO)?

Baked AO describes a prepared geometry configuration. Dynamic methods can respond to changes but have their own costs and limitations. The choice depends on the renderer and scene, not simply on whether you are producing a still or AR. Assess extra AO alongside the other lighting.

What resolution and bit depth should I choose for baked maps?

Consider framing, UV coverage, detail size, value range and the target system. A close-up may need more texture detail than a small interactive preview. Choose bit depth and format for each map. Use a test area to assess subtle gradients and detail resolution, and check which formats the target supports.

How do I prevent visible seams and artifacts during a normal bake?

Check UV seams, smoothing, tangent basis and triangulation in the baker and target renderer. Padding needs to remain sufficient when textures are downsampled. Check the normal-map convention and projection too; not every seam has the same cause. Further reading: baking in Marmoset Toolbag.

When and why should I use a cage?

A cage helps define the projection region between the target and source models. Its shape and distance need to suit the detail and nearby parts. Excessive distance can capture unrelated geometry; insufficient distance can miss detail. Further reading: cage and map settings in Substance 3D Painter.

Can Substance 3D Painter bake several maps together?

Yes. Baking mode lets you select and calculate the required mesh maps together. Select the maps and their settings for the relevant Texture Set. Larger series need planned model matching, settings and quality checks. Further reading: baking in Substance 3D Painter.

Which formats are suitable for PBR assets on the web or for AR?

Many web viewers support glTF/GLB. Apple Quick Look uses USDZ. Textures belong to the respective 3D asset and must suit the supported material model. Open the export in the target system and check textures, material channels, scale, and lighting. Further reading: Apple Quick Look.

How does an AO map differ from a lightmap?

AO approximates how nearby geometry occludes the surrounding environment. A lightmap stores calculated lighting contributions for a scene. AO replaces neither complete lighting nor its directional shadows. The information contained in a lightmap depends on the method used.

When do I need to rebake textures?

Changes to underlying geometry, UV layout or relevant material calculations may require affected maps to be rebaked. For baked lighting, this also applies to changes in the lighting setup. A color-only change need not affect every geometry map. Review the dependencies individually.