Methods for Merging Multiple Normals in Blender

Sep 8, 2024#blender笔记698

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The document explains how to combine two normal maps in Blender to achieve both detailed texture effects and wrinkles while optimizing texture resource usage. The goal is to create seamless, tileable textures with a single pattern for details and larger normal maps for wrinkles. The process involves connecting nodes in a specific order: 1. **Texture Repeat Control**: Use Ctrl+T to connect nodes. 2. **Normal A**: Represents the object's wrinkle normals, typically a single large texture. 3. **Normal B**: Represents texture details (e.g., fabric or leather) that can be tiled seamlessly. 4. **Texture Blending**: Mix the two normal maps using a "Soft Light" blending mode. 5. **Final Output**: Connect the blended node to the normal input of the Principled BSDF shader. This setup ensures clarity and efficiency in the material's appearance.

How to merge two normal maps in Blender
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This method combines both the wrinkled bump effect and the material texture bump details, aiming to maximize the resource savings of the texture. Seamless textures that can be tiled in all directions (for texture details) do not need to be very large in pixels; a single pattern is sufficient, while the wrinkled bump should be a large-sized bump. After connecting to the material node, it can ensure the clearest state. The specific node connection method is shown in the image below.

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The corresponding nodes are explained from left to right as follows:

Control Texture Repeat Node#

These two nodes will automatically connect to downstream nodes using the shortcut key ctrl+t.

Normal A#

Typically the wrinkled normal of the object, with a large texture pixel size, so it does not need to be repeated; just this one.

Normal B#

Typically the texture details of the object, such as the texture of a sweater or leather, which can be tiled seamlessly and scaled.
Therefore, the normal provided here should be able to be tiled seamlessly in all directions.

Texture Blend#

A node that blends the two normals together, with the blend mode set to: Soft Light, as shown in the red box position in the image.

Normal Map#

Finally, connect the upstream blended node to this, and output it to the normal node of the Principled BSDF material node.