I need to optimize my terrain but I don’t know how to

(outside)

(inside)

I have tried doing a i,v pairs loop but it was laggy and didnt work.

This is my code V

```
local replicatedStorage = game:GetService("ReplicatedStorage")
local runService = game:GetService("RunService")
local partContainer = Instance.new("Folder",workspace) partContainer.Name = "PerlinParts"
local propContainer = workspace:FindFirstChild("Props")
local blockSize = 2
local mapxSize = 16
local mapySize = 64
local mapzSize = 64
local noiseScale = 50
local amplitude = 12
local seed = math.random(300,5000000)
local function GenerateNoiseMap()
for x = 0,mapxSize do
for y=-mapySize/2, mapySize/2 do
for z = 0,mapzSize do
local xn = math.noise(y/noiseScale, z/noiseScale, seed) * amplitude
local yn = math.noise(x/noiseScale, z/noiseScale, seed) * amplitude
local zn = math.noise(x/noiseScale, y/noiseScale, seed) * amplitude
local density = xn + yn + zn + y
local part = Instance.new("Part")
if density <= 25 then
part = Instance.new("Part",partContainer) part.Anchored = true part.Size = Vector3.new(blockSize,blockSize,blockSize)
part.CFrame = CFrame.new(x*blockSize, y*blockSize, z*blockSize)
part.TopSurface = "Smooth" part.BottomSurface = "Smooth"
elseif density <= 24 then
return density
end
if density >= 25 then
local colorGenerator = math.random(90,100)
part.Color = Color3.fromRGB(colorGenerator,colorGenerator,colorGenerator)
end
if density <= 25 and density > 22 then
part.Color = Color3.fromRGB(math.random(90,110),math.random(160,180),math.random(0,10))
end
if density <= 22 and density > 17 then
part.Color = Color3.fromRGB(math.random(114,134),math.random(82,102),math.random(60,80))
end
if density <= 17 and density > 10 then
local colorGenerator = math.random(111,121)
part.Color = Color3.fromRGB(colorGenerator,colorGenerator,colorGenerator)
end
if density <= 10 then
local colorGenerator = math.random(90,100)
part.Color = Color3.fromRGB(colorGenerator,colorGenerator,colorGenerator)
end
end
runService.Heartbeat:Wait()
end
end
end
GenerateNoiseMap()
```