Get pixel from Rotated Texture2D

I am firing a raycast beam downward and changing the pixel it hits to red, the code works perfectly when orientated as shown in the first image, but when i rotate it 90 degrees it doesnt work correctly. The five red cubes each fire a raycast beam down into the center of the circle and change the pixel hit to red. What do i need to change to get it to work in the second orientation ?

image 1 (works):

image 2 (does not work):

My Code:

 for(int i=0; i<PunchPin.Count;i++){ //looping through cubes
             Debug.DrawRay(PunchPin[i].transform.position,Vector3.down,Color.cyan);
             RaycastHit hit;
             Physics.Raycast(PunchPin[i].transform.position,Vector3.down, out hit);
             if(hit.collider !=null){
                 if(hit.collider.gameObject.name == PunchTape.gameObject.name){
                     MeshRenderer rend = hit.collider.gameObject.GetComponent<MeshRenderer>();
                     Texture2D tex = (Texture2D)rend.material.mainTexture;
                     Vector2 uv;
                     uv.x = (hit.point.x - hit.collider.bounds.min.x) / hit.collider.bounds.size.x;
                     uv.y = (hit.point.z - hit.collider.bounds.min.z) / hit.collider.bounds.size.z;
                     Vector2 texCoord = hit.textureCoord2;
                     tex.SetPixel((int)(uv.x * tex.width), (int)(uv.y * tex.height),Color.red);
                     tex.Apply();
                 }
             }
         }