"it don't work" aside from being an abomination of the English language is also not very explicative. It tells neither how it failed to work nor in what context.

Instantiate does not take a ray as a position. You should try:

Instantiate(bednaPrefab, ray.origin, Quaternion.identity);

or more than likely

Instantiate(bednaPrefab, hit.point, Quaternion.identity);

Hello sorry, but i haven't much time before...

now:

I want to spawn a crate - where i click with my mouse. I want only X a Y axis, Z will be 0 (side platformer game).

I want to click & then spawns a crate (in air) and then it falls.

So i attached that script to main camera & it gives me this error:

Assets/Scripts/qe.js(12,40): BCE0023: No appropriate version of 'UnityEngine.Object.Instantiate' for the argument list '(UnityEngine.Transform, UnityEngine.Ray, UnityEngine.Quaternion)' was found.

I have rescripted it:

var bednaPrefab : Transform;


function Update () {

var mousex = Input.mousePosition.x;
var mousey = Input.mousePosition.y;
var ray = camera.main.ScreenPointToRay (Vector3(mousex,mousey,0));


if ( Input.GetMouseButtonDown(0) ){
var crate = Instantiate(bednaPrefab, ray.origin, Quaternion.identity);
}

}

Now it works, but it is spawning crate somewhere in space :D I have that script attached in Main Camera of 2D Platformer tutorial... So i need to make it like this:

You will play as normal. Then you click somewhere, and crate will spawns. It will get your mouse x & y (z = 0) and then spawns it. Crates are spawning, i can see, they are falling down, but i cant see the crates... Only in hierarchy. Help me! Any solutions?

This is a very old question I know but maybe some one will find this helpful. This works for me...

Should work - attach to main camera

var bednaPrefab : Transform;


function Update () {

var mousex = Input.mousePosition.x;
var mousey = Input.mousePosition.y;
var ray = camera.main.ScreenPointToRay (Vector3(mousex,mousey,0));

var hit : RaycastHit;

if (Physics.Raycast (ray, hit, 200)) {

}
if ( Input.GetMouseButtonDown(0) ){
var create = Instantiate(bednaPrefab, hit.point, Quaternion.identity);

}

}