Locally Welding VFX Flings you

[volostrs]

As the title say’s whenever I locally weld something to the player it flings them. This is a problem I encountered when trying to do Client Sided Replication or making VFX on the client. It flings the character or moving/rotating it.

It can be shown in this video:

I decided to disable the knockback (It uses Linear Velocity) and figured out that there’s no issue with the knockback turned off.

Shown Here:

So now the problem is finding a way for the 2 to combine with each other without flinging. I’ll send the code that I wrote for these scripts and how I’m using it.

The Linear Velocity System is Setup like this:

	local HRP = Character.HumanoidRootPart
	local Humanoid = Character:FindFirstChildOfClass("Humanoid")

	-- Ensure we have a RootAttachment
	local rootAttachment = HRP:FindFirstChild("RootAttachment")
	if not rootAttachment then
		rootAttachment = Instance.new("Attachment")
		rootAttachment.Name = "RootAttachment"
		rootAttachment.Parent = HRP
	end

	local LinearVelocity = Instance.new("LinearVelocity")
	LinearVelocity.Attachment0 = rootAttachment
	LinearVelocity.MaxForce = math.huge
	LinearVelocity.VectorVelocity = Direction.Unit * Distance
	LinearVelocity.Parent = HRP
-- Whenever I need to stop I'll destroy it LinearVelocity:Destroy()

And The VFX Script is used like this:

	-- Parent the VFX
	if Parent and Parent.Parent then
		clonedVFX.Parent = Parent
	else
		-- Create ClientFX folder if it doesn't exist
		if not workspace:FindFirstChild("ClientFX") then
			local clientFX = Instance.new("Folder")
			clientFX.Name = "ClientFX"
			clientFX.Parent = workspace
		end
		clonedVFX.Parent = workspace.ClientFX
	end

	-- Handle welding
	if ShouldWeld and Parent and Parent.Parent then
		local offsetCFrame = Position * Orientation
		local weld = createWeldConstraint(Parent, clonedVFX, offsetCFrame)

		-- Clean up weld after duration
		if Duration and Duration > 0 then
			Debris:AddItem(weld, Duration)
		end
	else
		-- If not welding, just position the VFX
		if Parent and Parent.Parent then
			clonedVFX.CFrame = Parent.CFrame * Position * Orientation
		end
	end
-- Yes before that I disable Anchored, CanCollide, etc.

[volostrs]

Okay, never mind; I’m the goat and figured it out in 6 minutes. I just replaced the old weld with these lines of code, in case anyone wants to know.

        
        -- Use a RunService connection instead of welding during movement
        local connection
        connection = game:GetService("RunService").Heartbeat:Connect(function()
            if clonedVFX.Parent and Parent.Parent then
                clonedVFX.CFrame = Parent.CFrame * offsetCFrame
            else
                connection:Disconnect()
            end
        end)

I’m not too sure if it’s the most optimized, though. It might also be a problem with linear velocity. If you’re having an issue like this, lmk if AssemblyLinearVelocity fixes this; otherwise, use Run Service.