So right now i have a script thats supposed to generate terrain for a game im making but the terrain is really repetitive and is not dynamic enough. i want to know how i can make it so that one part will have a hill and one part will be desert and in the desert there are small hills but in the mountainous region there are big hills.

current script

```
local X, Z = 15,15
local wedge = Instance.new("WedgePart");
wedge.Anchored = true;
wedge.TopSurface = Enum.SurfaceType.Smooth;
wedge.BottomSurface = Enum.SurfaceType.Smooth;
local function draw3dTriangle(a, b, c)
local ab, ac, bc = b - a, c - a, c - b;
local abd, acd, bcd = ab:Dot(ab), ac:Dot(ac), bc:Dot(bc);
if (abd > acd and abd > bcd) then
c, a = a, c;
elseif (acd > bcd and acd > abd) then
a, b = b, a;
end
ab, ac, bc = b - a, c - a, c - b;
local right = ac:Cross(ab).unit;
local up = bc:Cross(right).unit;
local back = bc.unit;
local height = math.abs(ab:Dot(up));
local w1 = wedge:Clone();
w1.Size = Vector3.new(2, height, math.abs(ab:Dot(back)));
w1.CFrame = CFrame.fromMatrix((a + b)/2, right, up, back);
w1.Parent = workspace.BlockTerrain;
local w2 = wedge:Clone();
w2.Size = Vector3.new(2, height, math.abs(ac:Dot(back)));
w2.CFrame = CFrame.fromMatrix((a + c)/2, -right, up, -back);
w2.Parent = workspace.BlockTerrain;
return w1, w2;
end
local positionGrid = {}
for x = 0, X do
positionGrid[x] = {}
for z = 0, Z do
local random = 10
local random1 = math.random(50,100)
local random2 = 10
positionGrid[x][z] = Vector3.new(x*random, math.noise(x/random2, z/random2) * random1, z*random)
end
end
for x = 0, X-1 do
for z = 0, Z-1 do
local a = positionGrid[x][z]
local b = positionGrid[x+1][z]
local c = positionGrid[x][z+1]
local d = positionGrid[x+1][z+1]
draw3dTriangle(a, b, c)
draw3dTriangle(b, c, d)
end
end
for i,v in pairs(game.Workspace.BlockTerrain:GetChildren()) do
local s= v.Size
if v.Name == "Water" then
workspace.Terrain:FillBlock(v.CFrame,s,Enum.Material.Water)
v:Destroy()
end
end
for i,v in pairs(game.Workspace.BlockTerrain:GetChildren()) do
local s= v.Size+Vector3.new(20,0,0)
if v.Position.Y < -20 then
workspace.Terrain:FillBlock(v.CFrame,s,Enum.Material.Sand)
v:Destroy()
elseif v.Position.Y > -20 and v.Position.Y < 15 then
workspace.Terrain:FillBlock(v.CFrame,s,Enum.Material.Grass)
v:Destroy()
else
workspace.Terrain:FillBlock(v.CFrame,s,Enum.Material.Snow)
v:Destroy()
end
end
```

thank you in advance