To whom it may concern,
I am trying to create a fading bullet trail (from a raycast) using a LineRenderer with an assigned gradient (Black--> White--> Black) texture. I can make the bullet trail look very pretty in the scene using the "Particles/Additive (Soft)" shader; however, I cannot make the bullet disappear slowly.
My question is:
How can I get a bullet to fade away?
I know that I should have something like this in a script attached to each bullet:
var visibility : float = 1;
visibility -= 2*Time.deltaTime;
if(visibility < 0) this.destroy();
I just have no idea of where to plug in the visibility variable.
Answer by Matt Downey
Oct 24, 2011 at 10:00 PM
In order to create fading bullet tracers, make a bullet prefab with the attached script at the bottom. The BulletTrail Prefab should have a lineRenderer component with this attached material:
Use the shader called "Particles/Additive" when attaching the material to the lineRenderer.
//Script called "SelfDestruct.js" attached to the BulletTrail prefab.
var visibility : float;
var Line : LineRenderer;
function Start ()
visibility = .5; //setting it to 1 doesn't fade until .5
Line = transform.GetComponentInChildren(LineRenderer);
function Update ()
visibility -= Time.deltaTime;
if(visibility < 0) Destroy(gameObject);
Answer by syclamoth
Oct 24, 2011 at 07:32 AM
lineRenderer.material.color = Color.Lerp(Color.clear, Color.white, visibility);
where visibility is a number between 0 and 1. If your material uses a tint colour, save that in Awake, and then use that instead of Color.white.
Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.
The best place to ask and answer questions about development with Unity.
To help users navigate the site we have posted a user guide.
If you are a new user, check out our FAQ for more information.
If you are a moderator, see our Moderator Guidelines page.
We are making improvements to UA, see the list of changes.
For troubleshooting common problems with Unity 5.x Editor (including Win 10).
Answers and Comments
3 People are following this question.
How can I can I cast a ray from a gameobject?
Bullet collision for space shooter - colliders, rays, etc?
Make my gun model fire bullets
Raycast LineRenderer, how to set end direction of Ray by transform to the center of the screen or crosshair?
Line Renderer and Ray Casting issue