# Normal Layer (/materials-shading/surface-detail/normal-layer)



In 3D geometry, the normals define the orientation of each of the triangles that form a shape.

The colors come from mix of the channels Y (green), X (red), and Z (blue). You can play around with the different channels and blending modes to add direction-based color tone changes to your 3D models.

<Video src="https://cdn.spline.design/_assets/docs/3c2b367a-9634-4322-b53a-75651243da86.mp4" />