Building system y axis freaking out

[GammerAtomYT (LplusRatioPlusMad)]

title. I’ll start off by showing screenshots first:

Script inside the BlueBlock tool:

                                 ---------------------------------------------VARIBLES-------------------------------------------------
local remoteEvent = game.ReplicatedStorage:WaitForChild("BuildingSystemEvent")
local runService = game:GetService("RunService")
local tool = script.Parent
local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local grid = 1.5
local blueBlock = game.ReplicatedStorage:WaitForChild("BlueBlock")
local shadow_block = blueBlock:Clone(); shadow_block.Transparency = .5; shadow_block.Parent = workspace.Blocks.ShadowBlocks; shadow_block.CanCollide = false
if shadow_block.CanCollide == true then
	print("BRUH")
end

mouse.TargetFilter = shadow_block

                                ---------------------------------------------FUNCTIONS-------------------------------------------------

function snapToGrid(x)
	return math.floor(x/grid + 0.5)*grid
end

function calculateY(toP, toS, oS)
	return (toP + toS * 0.5) + oS * 0.5
end

runService.RenderStepped:Connect(function()
	if mouse.Target ~= nil then
		shadow_block.Position = Vector3.new(snapToGrid(mouse.Hit.Position.X), calculateY(mouse.Target.Position.Y, mouse.Target.Size.Y, blueBlock.Size.Y), snapToGrid(mouse.Hit.Position.Z))
	end

	if tool:FindFirstAncestorWhichIsA("Model") ~= player.Character then
		shadow_block.Transparency = 1
	else
		shadow_block.Transparency = .5
	end
end)

tool.Activated:Connect(function()
	if tool:FindFirstAncestorWhichIsA('Model') == player.Character then
		print(shadow_block.Position)
		remoteEvent:FireServer("blueBlock", shadow_block.Position)
		print("script is working")
	end
end)

Script inside the RedBlock tool:

                                 ---------------------------------------------VARIBLES-------------------------------------------------
local remoteEvent = game.ReplicatedStorage:WaitForChild("BuildingSystemEvent(redblock)")
local runService = game:GetService("RunService")
local tool = script.Parent
local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local grid = 1.5
local red_block = game.ReplicatedStorage:WaitForChild("RedBlock")
local shadow_block = red_block:Clone(); shadow_block.Transparency = .5; shadow_block.Parent = workspace.Blocks.ShadowBlocks; shadow_block.CanCollide = false
if shadow_block.CanCollide == true then
	print("ooooo")
end
mouse.TargetFilter = shadow_block

                                ---------------------------------------------FUNCTIONS-------------------------------------------------

function snapToGrid(x)
	return math.floor(x/grid + 0.5)*grid
end

function calculateY(toP, toS, oS)
	return (toP + toS * 0.5) + oS * 0.5
end

runService.RenderStepped:Connect(function()
	if mouse.Target ~= nil then
		shadow_block.Position = Vector3.new(snapToGrid(mouse.Hit.Position.X), calculateY(mouse.Target.Position.Y, mouse.Target.Size.Y, red_block.Size.Y), snapToGrid(mouse.Hit.Position.Z))
	end

	if tool:FindFirstAncestorWhichIsA("Model") ~= player.Character then
		shadow_block.Transparency = 1
	else
		shadow_block.Transparency = .5
	end
end)

tool.Activated:Connect(function()
	if tool:FindFirstAncestorWhichIsA('Model') == player.Character then
		print(shadow_block.Position)
		remoteEvent:FireServer("red_block", shadow_block.Position)
		print("script is working")
	end
end)

Server script in ServerScriptService for the blue tool:

local remoteEvent = game.ReplicatedStorage:WaitForChild("BuildingSystemEvent")

remoteEvent.OnServerEvent:Connect(function(player, block, position)
	print(position)
	local clone = game.ReplicatedStorage:WaitForChild("BlueBlock"):Clone()
	clone.Parent = workspace.Blocks.BlueBlocks
	clone.Position = position
end)

Server script in ServerScriptService for the red tool:

local remoteEvent = game.ReplicatedStorage:WaitForChild("BuildingSystemEvent(redblock)")

remoteEvent.OnServerEvent:Connect(function(player, block, position)
	print(position)
	local clone = game.ReplicatedStorage:WaitForChild("RedBlock"):Clone()
	clone.Parent = workspace.Blocks.BlueBlocks
	clone.Position = position
end)

1. So, for some reason, they work fine when the other script in the other tool is disabled.
   But, as shown in the video above, if they’re both active and both of their scripts are enabled, the y axis gets a little funky.
2. Also, after the first issue is resolved, another slight annoyance happens where, I can’t place the block on the side if it is in the air:
   
   
   
   this is what the regular building indicator looks like:
   
   
   
   PLEASE HELP

(If any screenshots can’t be viewed, try clicking on them to open it up.)

[iGottic]

Instead of using the Mouse object, use both Camera:ViewportPointToRay() and Workspace:Raycast(). By using ray casts to find the mouse target position, you can better customize ray cast parameters and this avoid issues. Try this, see if it works!

[GammerAtomYT (LplusRatioPlusMad)]

Could you help me with that? I’m very new to raycasting.

[iGottic]

I recommend taking a look at this guide:

Raycasting

[GammerAtomYT (LplusRatioPlusMad)]

I did, but i still dont know how to incorporate into my script.