Collision point on surface?

Hi,

When you have a collison (assuming you are using OnCollisionEnter) then point of contact is stored in then Collision object. It's accesible by "collision.contacts".

 void OnCollisionEnter(Collision collision) {
    // 1st point of contact
    ContactPoint contactPoint = collision.contacts[0];

    // Create the prefab at the contact point of the collision
    Instantiate(prefab, contactPoint.point, transform.rotation);
 }

I can't test it right now to test this... let me know if it helped =D