For future viewers, this is how my sphere looks like now, also, here are the correct coordinates

    float vertices[] = {
        //top-north-east
         0.0f, 1.0f,  0.0f,
         0.0f,  0.0f,  1.0f,
         1.0f,  0.0f,  0.0f,

        //top-north-west
         0.0f,  1.0f,  0.0f,
        -1.0…

Problem has been fixed. uvScale had an invalid Value, so HeightMap.SampleLevel always was zero.

Not a problem! I hope that it helps. ^_^

RobMadison said:

you can also draw a large grid using triangles and tessellate each triangle based on the control points’ positions.

Yes, that is typically how it's done - the vertex shader gets the distance and passes it on to the tessellation control stage, one place or the other, it's decided what…