Bullet trail using FastCast module

How would I make a bullet trail using the FastCast module?

I’m not on PC right now, on mobile, so I can’t give you any code. I can point you in the direction which I use. When you use fastCast, there is an option for an cosmetic bullet, when you instance the part for the cosmetic bullet, instance 2 attachment points and a trail and properly add the attachments through the position property. (I would recommend building your bullet in workspace then you can copy it in.

Thanks for the reply. I might need some further guidance we you get on PC because I think I’m going to get lost along the way…

Are you trying to do something like trails?

Yes but what way should I do it?

So here is the API page that has the CosmeticBulletTemplate, which you will want to be using.

So once you have made your cast,
it should look something like this:

local fastCast = require(--Path to module)
local caster = fastCast.new()

To start, we need a bullet folder in the workspace, which we will create like this:

local bulletFolder = workspace:FindFirstChild("BulletFolder") or Instance.new("Folder", workspace)
bulletFolder.Name = "BulletFolder"

Then we want to make a bullet, for example, I will be using a default part.

local bulletPart= Instance.new("Part")
bulletPart.CanCollide = false
bulletPart.Material = Enum.Material.Metal

Then, we want to make some attachments:

local attach0 = Instance.new("Attachment")
attach0.Name = "Attachment0"
attach0.Parent = bulletPart
attach0.Position = Vector3.new(0, 0.055, 0)

local attach1 = Instance.new("Attachment")
attach1.Name = "Attachment1"
attach1.Parent = bulletPart
attach1.Position = Vector3.new(0, -0.055, 0)

Then we can make our trail:

local trailPart = Instance.new("Trail")
trailPart.Parent = bulletPart	
trailPart.Attachment0 = bulletPart.Attachment0
trailPart.Attachment1 = bulletPart.Attachment1
trailPart.Lifetime = 0.1

And then finally we can tie it together with the behavior.

local castBehavior = fastCast.newBehavior()
castBehavior.CosmeticBulletContainer = bulletFolder
castBehavior.CosmeticlugerBullet = bulletPart

And that should be it