Why Geometry's Tangent are difference from Tangent node? According to the document, geometry node's tangent is surface tangent in world space. And tangent node is from a manually created UV Map for full control when use UVMap. They output difference result to me.


In my understanding, tangent inherently associated with uv, so the tangent node output result is right. I just wonder what exactly is the geometry's tangent to. Can anyone explaning it to me? Thanks
Per your link:

Direction Type
The tangent direction can be derived from a cylindrical projection
around the X, Y, or Z axis (radial), or from a manually created UV
Map for full control.

Geometry -&gt; Tangent is giving you the same output as the Tangent node set to Radial Z.