# Check for normalized UV channels

> Use this feature to check if the UV coordinates of a 3D mesh are normalized, ensuring they fall within the standard 0 to 1 range for proper texture mapping.

API function: [polygonal.hasNormalizedUVs(mesh, channel) -> bool](/asset-transformer-sdk/2026.4/api/python/polygonal_functions.md#hasnormalizeduvs)

Returns true if the provided UV channel is defined and if all its texture coordinates belongs to the range \[0, 1].

## Parameters

* mesh: the mesh for which UV channel must be checked.
* uvChannel (default -1): the UV channel to verify. If -1 is provided, the function returns true if all UV channels are normalized.