# Check for existence of UV channels

> Use this feature to check if a 3D asset has UV coordinates, which are essential for texture mapping and rendering.

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

Returns true if the required UV channel is defined in the mesh, false otherwise.

## Parameters

* mesh: the mesh for which UV channel existence must be checked.
* uvChannel (default -1): the UV channel to verify. If -1 is provided, the function returns true if any UV channel is defined in the mesh.