Create a new empty game object and rename it to Bolt and reset its transform then create a quad and name it VFX and reset its transform as well them add it as a child of bolt. Change the transform rotation X-axis of VFX to 90, to rotate it upwards to the camera. Now we need an image for the bolt, in the materials folder create material which makes a new material in the materials folder and rename it to fx_bolt_orange. Next drag the texture onto the newly created material to apply that texture to it. Now drag the material onto the quad. Once again, we need to change the shader of the material to particles, additive. Now select the Bolt parent and add component, physics, rigidbody and deselect use gravity, reselect VFX and remove the mesh collider component then back to the Bolt parent and add component physics, capsule collider. Change the direction to Z-axis then resize the collider via the radius and height to match the Bolts size and select the Is Trigger box. Still in the Bolt parent add another component, Script, new script and name it Mover and place it into the scripts folder then open it up in monoDevelop.

Public class Mover : MonoBehaviour
{
Public float speed;
Void start ()
{
GetComponent<rigidbody>().velocity = transform.forward * speed;
}
}

Move the Bolt and VFX assets to prefab and select the Bolt and change the speed to 20 since the ships speed is set to 10 currently, now delete bolt from the hierarchy and click play then click and drag the bolt in the prefab into hierarchy and you can see copies of the bolt being fired while the game is running.



Now we need to create a boundary so that the bolts can despawn after going a certain distance. Create new game object 3D cube and name it Boundary and make sure its at origin. On the box collider component make sure Is Trigger is selected/checked, now set the transform position Z-axis to 5 and the transform scale X-axis 15 and Z-axis 20, then deselect Mesh Renderer so that you cannot see the box when playing the game. With Boundary selected add component, script, new script and name it DestroyByBoundary and place it in the scripts folder and now open the script.

Public class DestroyByBoundary : MonoBehaviour
{
Void onTriggerExit(Collider other) {
Destroy(other.gameObject);
}
}

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