Example 4.1

-- Dive (clientSided)
local tool = script.Parent.Parent
local player = game.Players.LocalPlayer
local char = player.Character
local hmrp = char.HumanoidRootPart
local character = player.Character
local userInputService = game:GetService("UserInputService")
local isPressingQ = false
local equipped = false
local effects = tool.Effects.Q
local remoteEvents = effects.RemoteEvents

local mouse = player:GetMouse()

clientTarget = nil
globalCFrame = nil
targetCFrame = nil
globalRangeLimit = nil
globalWeld = nil

charDescendantTable = {}

-- Config --
local MaxPlaceDistance = 110
--

tool.Equipped:Connect(function()
    equipped = true
end)

tool.Unequipped:Connect(function()
    equipped = false
end)

local function CreateRaycastParams()
    local raycastParams = RaycastParams.new()

    raycastParams.FilterDescendantsInstances = {clientTarget, char}

    raycastParams.CollisionGroup = "Default"

    raycastParams.FilterType = Enum.RaycastFilterType.Exclude
    return raycastParams
end

local function getGroundPosition(position)
    local groundRaycastParams = RaycastParams.new()

    groundRaycastParams.FilterDescendantsInstances = {char, clientTarget, char:GetDescendants(), workspace:WaitForChild("ServerEffectStorage"):GetDescendants()}
    groundRaycastParams.FilterType = Enum.RaycastFilterType.Exclude

    local groundRay = workspace:Raycast(position, Vector3.new(0, -100,0), groundRaycastParams)

    if groundRay then
        return groundRay.Position
    else
        return position
    end
end


local function UpdateTargetCFrame()
    local Origin = hmrp.Position
    local MousePosition = mouse.Hit.p
    local Direction = (MousePosition - Origin).unit
    local raycastParams = CreateRaycastParams()
    local RayCastResult = workspace:Raycast(Origin, Direction * MaxPlaceDistance, raycastParams)
    local TargetPosition
    if RayCastResult then
        TargetPosition = RayCastResult.Position
    else
        TargetPosition = Origin + Direction * MaxPlaceDistance
    end
    TargetPosition = getGroundPosition(TargetPosition)
    clientTarget.Position = TargetPosition
end

userInputService.InputBegan:Connect(function(input, gameprocess)
    if gameprocess then return end
    if input.KeyCode == Enum.KeyCode.Q and equipped == true then

        print(player.Name.." has pressed Q. It's being held down.")

        local localCFrame = character.HumanoidRootPart.CFrame

        remoteEvents.Press:FireServer(localCFrame)

        --// Creating a client target \\--
        isPressingQ = true

        local hipHeight = character.Humanoid.HipHeight

        local target = game:GetService("ReplicatedStorage"):WaitForChild("ServerParts"):WaitForChild("Water"):WaitForChild("Q"):WaitForChild("Target"):Clone()
        target.Parent = workspace
        clientTarget = target

        local rangeLimit = game:GetService("ReplicatedStorage"):WaitForChild("ServerParts"):WaitForChild("Water"):WaitForChild("Q"):WaitForChild("RangeLimit"):Clone()
        rangeLimit.Parent = workspace
        rangeLimit.CFrame = localCFrame * CFrame.new(0,-hipHeight,0)
        rangeLimit.Parent = char
        globalRangeLimit = rangeLimit
        local weld = Instance.new("WeldConstraint")
        weld.Part0 = rangeLimit
        weld.Part1 = character.HumanoidRootPart
        weld.Parent = char
        globalWeld = weld

        -- Get the player ignore list immediately, once. --
        -- Discontinued: now uses CollisionGroup.


        while isPressingQ == true do
            wait()
            UpdateTargetCFrame()
        end

    end
end)


userInputService.InputEnded:Connect(function(output, gameprocess)
    if gameprocess then return end
    if output.KeyCode == Enum.KeyCode.Q and equipped == true then

        print(player.Name.." has stopped pressing Q.")
        isPressingQ = false

        globalWeld:Destroy()

        local localCFrame = character.HumanoidRootPart.CFrame
        globalCFrame = localCFrame
        targetCFrame = clientTarget.CFrame

        remoteEvents.Release:FireServer(globalCFrame,targetCFrame)

        task.spawn(function()
            for i = 1,130 do wait()
                globalRangeLimit.Attachment.Ring.Rate -= 1
            end
            globalRangeLimit:Destroy()
        end)



        -- FoV --

        local camera = workspace.CurrentCamera
        local tweenService = game:GetService("TweenService")

        local tweenInfo = TweenInfo.new(.55, Enum.EasingStyle.Sine, Enum.EasingDirection.Out, 0, true)
        local tweenFov = tweenService:Create(camera, tweenInfo, { FieldOfView = 100 })

        tweenFov:Play()

        -- FoV II --

        tweenFov.Completed:Connect(function()
        local tweenInfo2 = TweenInfo.new(.4, Enum.EasingStyle.Sine, Enum.EasingDirection.Out, 0, true)
        local tweenFov2 = tweenService:Create(camera, tweenInfo, { FieldOfView = 40 })

            tweenFov2:Play()

            clientTarget:Destroy()
        end)
    end
end)