Finding the index in a material where a raycast hit

Question

I have a gameobject with a mesh collider. The mesh is simply a flat plane.

I raycast to the mesh and I'd like to get the index on the material's basemap where I got a hit.

I assumed hit.textureCoord or hit.textureCoord2 would do the trick, but all I get is either (0,0) or (1,1) and nothing inbetween.

I triple checked and the collider is definitely a mesh collider, so I can only assume I misunderstood what textureCoord does

Answer 1

Apparently I misunderstood what hit.textureCoord does. Since the mesh I was dealing with had only 4 vertices and 2 triangles (a simple plane), it can only return (0,0) or (1,1), for each of the two triangles.

In general, hit.textureCoord seems to return a vector2 associated with the triangle hit, rather than anything to do with the basemap on the material itself.