Problem about player build mode

Help and Feedback Scripting Support
#1

I was trying to learn how to create player build mode. I am trying to make some scripts that can make me place some blocks by clicking.

PicPic
PicPic1920×1080 1.32 MB

LocalScript:

local InBuildMode = false
local UIS = game:GetService("UserInputService")

local Mouse = game.Players.LocalPlayer:GetMouse()
local ShowingPart = game.ReplicatedStorage:WaitForChild("Part")
local BuildBlock = game.ReplicatedStorage:WaitForChild("BuildBlock")

Mouse.TargetFilter = ShowingPart

UIS.InputBegan:Connect(function(input)
if input.KeyCode == Enum.KeyCode.B then
	if InBuildMode == false then
		InBuildMode = true
	else
		InBuildMode = false
	end
	
elseif input.UserInputType == Enum.UserInputType.MouseButton1 then
	if InBuildMode == true then
		
		local X = math.round(Mouse.Hit.x/4) * 4
		local Y = math.round(Mouse.Hit.y/4) * 4
		local Z = math.round(Mouse.Hit.z/4) * 4
		
		BuildBlock:FireServer(X,Y,Z)
		
	end
end
end)

game:GetService("RunService").RenderStepped:Connect(function()
if InBuildMode == false then
	ShowingPart.Parent = game.ReplicatedStorage
else
	ShowingPart.Parent = workspace
	local X = math.round(Mouse.Hit.x/4) * 4
	local Y = math.round(Mouse.Hit.y/4) * 4
	local Z = math.round(Mouse.Hit.z/4) * 4
	
	ShowingPart.Position = Vector3.new(X,Y,Z)
end
end)

ServerScript:

game.ReplicatedStorage.BuildBlock.OnServerEvent:Connect(function(Player,X,Y,Z)

 	local InstanceBlock = Instance.new("Part")
 	InstanceBlock.Parent = workspace
    InstanceBlock.Size = Vector3.new(4,4,4)
 	InstanceBlock.Anchored = true
    InstanceBlock.Color = 
    Color3.fromRGB(math.random(0,255),math.random(0,255),math.random(0,255))


	InstanceBlock.BrickColor = BrickColor.new("White")


	InstanceBlock.Position = Vector3.new(X,Y,Z)
end)

But sometimes I can place a block inside other blocks.

robloxapp-20210621-2118423.wmv (833.5 KB)

Someone tell me how should I do to avoid this happen :sweat: :sweat: :sweat:.