Raycast different between server and client

[Anzura1 (HallowedBeThyName)]

I have these 2 scripts on the client and the server, both using the same Validator module to validate stuff. This validator creates a raycast, and in theory, it should be the same between the server and the client. But it’s different, the raycast on the server does not hit anything. If anyone has a solution, I’d be very grateful.

This is the print log.

-- server
local object
	
	if special then
		object = RS.Accessories:FindFirstChild(name)
	else
		object = RS.Placables:FindFirstChild(name,true)
	end
	
	local plot = OccupiedPlots[player.UserId]
	if not object or not plot then return false end
	
	local result 
	local raycast: RaycastResult
	
	local newObj = object:Clone()
	newObj:PivotTo(targetCf)
	
	if not special then
		result = Validator.IsWithinBounds(plot, object.Box:GetExtentsSize(), targetCf) and Validator.NotCollidingObjects(plot, object.Box:GetExtentsSize(), targetCf)
	else
		result, raycast = Validator.ItemValidation(plot, newObj)
		print("server: "..tostring(result))
		print("server: "..tostring(newObj:GetPivot()))
	end
	
	if result and not special then
		newObj.Parent = plot.StoreItems
		return true
	elseif result and special then
		newObj.Parent = raycast.Instance
		raycast.Instance:SetAttribute("Occupied", true)
		return true
	else
		newObj:Destroy()
		return false
	end

--local
local cast = CastMouse(self.Preview)
if cast and cast.Instance and self.Special and cast.Instance.Parent.Name == "PlacableAreas" then
		local position = cast.Instance.Position
		local CF = CFrame.new(position) * CFrame.Angles(0,self.Rotation,0)
		self.Preview:PivotTo(CF)

		self.Preview:FindFirstChild("SelectionBox",true).Adornee = self.Preview
		
		local result, raycast = Validator.ItemValidation(self.Plot, self.Preview)
		print("local: "..tostring(result))
		print("local: "..tostring(self.Preview:GetPivot()))
	
		self.Preview:FindFirstChild("SelectionBox",true).Color3 = 
			if Validator.ItemValidation(self.Plot, self.Preview) then 
				Color3.new(0.184314, 1, 0)
			else 
				Color3.new(1, 0, 0)
	end	

--validator
function module.ItemValidation(plot: Model, object: BasePart)
	local params = RaycastParams.new()
	params.FilterType = Enum.RaycastFilterType.Include
	local filteredItems = {}
	
	for _,v:BasePart in plot.StoreItems:GetDescendants() do
		if not v:FindFirstChildOfClass("SelectionBox", true) then continue end
		table.insert(filteredItems, v)
	end
	
	for _,v in filteredItems do
		params:AddToFilter(v)
	end
	
	local originPoint: Vector3 = object.Position + Vector3.new(0,0.5,0)
	local destination: Vector3 = object.Position + Vector3.new(0,-1.4,0)
	
	if RunS:IsServer() then
		print("module server: "..tostring(object:GetPivot()))
	else
		print("module local: "..tostring(object:GetPivot()))
	end
	local raycast = workspace:Raycast(originPoint, destination - originPoint, params)
	
	if raycast and raycast.Instance and table.find(filteredItems, raycast.Instance) and not raycast.Instance:GetAttribute("Occupied") then
		return true, raycast
	end
	
	return false
	
end

[SeargentAUS (Seargent)]

Is the object moving at the time of the raycast?
Does the object exist on both the server and client?

[Anzura1 (HallowedBeThyName)]

The CFrame printed is the same across 3 scripts, so I don’t think that it’s moving. The client has a preview model to move and rotate around, and when they click, it invokes a remote function to clone it on the server side.

[Anzura1 (HallowedBeThyName)]

It turns out that I totally forgot about replication in the code, so the if condition failed on the server, because I only created those parts on the client. I changed the if condition to something else, and now it works well.