2dnoisev2

local seed = (math.random() - .5)*2^16
local IT_X = 500
local IT_Z = 500
local size = Vector3.new(4, 1, 4)
local snow = 7/8
local rock = 5/8
local grass = 3/8
local sand = 2/8
local terrain = true
local amplitude = 500
local detail = 70
local offset = Vector3.new(0, 2, 0) + owner.Character.HumanoidRootPart.Position

function color(noise)
    local unamnoise = noise/amplitude
    if unamnoise > snow then
        if terrain then
            return Enum.Material.Snow
        end
        return Color3.new(1,1,1)
    end
    if unamnoise > rock and unamnoise < snow then
        if terrain then
            return Enum.Material.Rock
        end
        return Color3.new(.5, .5, .5)
    end
    if unamnoise > grass and unamnoise < rock then
        if terrain then
            return Enum.Material.Grass
        end
        return Color3.new(.1, .8, .1)
    end
    if unamnoise > sand and unamnoise < grass then
        if terrain then
            return Enum.Material.Sand
        end
        return Color3.new(.9, .9, .7)
    end
    if unamnoise < sand then
        if terrain then return Enum.Material.Water end
        return Color3.new(.2, .2, 1)
    end
end

function MakeTheStuff(xpos, zpos)
    local noise = math.max((math.noise(xpos/detail + seed, zpos/detail + seed) + .5), sand - .01)*amplitude
    local part = Instance.new("SpawnLocation", script)
    part.Size = Vector3.new(size.X, noise, size.Z)
    part.Position = Vector3.new(xpos, noise/2, zpos)*size + offset
    part.Anchored = true
    part.Enabled = false
    part.Material = "SmoothPlastic"
    if noise == 0 then
        print(noise)
    end
    if terrain then
        workspace.Terrain:FillBlock(part.CFrame, part.Size, color(noise))
        part.Parent = nil
    else
        part.Color = color(noise)
    end
end

function run(xpos, zpos)
    local s, e = pcall(function() MakeTheStuff(xpos, zpos) end)
    if e then
        task.wait()
        run(xpos, zpos)
    end
end

for x = 1,IT_X do
    for z = 1,IT_Z do
        run(x, z)
    end
    task.wait(.1)
end