Region 3 not being detected if part is not detected

Hello, if you are confused from the title. I’ll explain it more for ya.
Basically im trying to detect if a part is not detected by region3. however for some reason region3 will only detect parts that are in its sight. heres the code.

--Ignore list/Whitelist for the region3
local ViewportHandler = require(script.ViewportHandler)
local staticDelay = 60 -- the amount of time it takes to update static parts, in steps
local VF_Handler = ViewportHandler.new(script.Parent.ViewportFrame)
local renderDistance = 100
local list = {workspace.ViewportPart, workspace.CamPart, humanoidcurrent}
local PartLimit = 100
local RecordedParts = {}
local camera = Instance.new("Camera", script.Parent) -- Create the camera
camera.CFrame = script.Parent.Adornee.CFrame + script.Parent.Adornee.CFrame.LookVector*2

local viewport = script.Parent.ViewportFrame

viewport.CurrentCamera = camera


local function renderStatic()
	--Create the region3 to detect the parts
	local center = (camera.CFrame.LookVector*renderDistance)/2
	local corner = Vector3.new(renderDistance/2,renderDistance/4,renderDistance/2)
	local renderRegion = Region3.new(center - corner, center + corner)
	
	--Get all parts within the region
	local parts = workspace:FindPartsInRegion3WithIgnoreList(renderRegion, list, PartLimit)
	--Loop through the parts
	for i,v in pairs(parts) do
		if v.ClassName == "Part" or v.ClassName == "MeshPart" or v.ClassName == "BasePart" or v.ClassName == "SpawnLocation" or v.ClassName == "CornerWedgePart" or v.ClassName == "WedgePart" or v.ClassName == "Decal" or v.ClassName == "SpecialMesh" then
			if not v.Parent:FindFirstChild("Humanoid") then
				if not v.Parent.Parent:FindFirstChild("Humanoid") then
					if not v:FindFirstChild("Render1") then
						
						render1 = Instance.new("BoolValue")
						render1.Name = "Render1"
						render1.Parent = v
						partcurrent = VF_Handler:RenderObject(v,workspace.Commands.FPS.Value)
						end
				end
			end
		end

		if #parts > 0 then	
			print(v.Name.." is in zone") -- is being printed
				
		else
			print(v.Name.." is not in zone") -- not being printed even though this should be
				end
		end
end

game:GetService("RunService").RenderStepped:Connect(function()
	renderStatic()
end)

I would suggest using GetPartBoundsInBox rather than Region3. Let me know if this helps.