"Squashing" effect for 3d Perlin Noise

[LOL_fun26]

Hello I’m a new developer currently exploring procedural terrain generation. I have already implemented a 3d Perlin noise generator and made it generate a 3d map tho it look like this: (looks very swiss cheesy)

I have found this video at timestamp 27:58 he explains “squashing” however Idk how to properly implement it . (btw shout out to Henrik he’s a great resource for procedural generation)

Here’s a snippet of the code:

--SERVICES
local WS = game:GetService("Workspace")

--OBJECTS
local Chunks_Folder = WS:WaitForChild("Chunks")

--VARIABLES
local chunkName = "Chunk_%d X_%d Y_%d Z"

--SETTINGS
local CHUNK_SIZE = 32
local SEED = 0
local RESOLUTION = 10
local AMPLITUDE = 10
local MIN_DENSENESS = 1
local SQUASHING = 1

--FUNCTIONS
local function generateChunk(x: number, y: number, z: number)
	--Model container
	local chunk = Instance.new("Model")
	chunk.Name = string.format(chunkName, x, y, z)
	
	--Generating the blocks
	for x = x, x + CHUNK_SIZE - 1 do
		for y = y, y + CHUNK_SIZE - 1 do
			for z = z, z + CHUNK_SIZE - 1 do
				local X = math.noise(y / RESOLUTION, z / RESOLUTION, SEED) * AMPLITUDE
				local Y = math.noise(x / RESOLUTION, z / RESOLUTION, SEED) * AMPLITUDE
				local Z = math.noise(x / RESOLUTION, y / RESOLUTION, SEED) * AMPLITUDE
				
				local density = X + Y + Z
				
				if density >= MIN_DENSENESS then
					local part = Instance.new("Part")
					part.Anchored = true
					part.Size = Vector3.new(1, 1, 1)
					part.Position = Vector3.new(x, y, z)
					part.Parent = chunk
				end
			end
		end
	end
	
	chunk.Parent = WS
end

--RUN CODE
generateChunk(0, -CHUNK_SIZE, 0)
generateChunk(CHUNK_SIZE, -CHUNK_SIZE, 0)
generateChunk(0, -CHUNK_SIZE, CHUNK_SIZE)
generateChunk(CHUNK_SIZE, -CHUNK_SIZE, CHUNK_SIZE)

[happya_x (Happya)]

i think he means to pass the noise values into a function that changes the values to be lower as height increases

you can mess around with different types of functions for better results

--linear example
local function squash(x : number, height : number) : number
  return x - height
end

--usage example
local X = math.noise(y / RESOLUTION, z / RESOLUTION, SEED)
X = squash(X, y)

[LOL_fun26]

yea I have this idea to implement a “water line” here’s a visualization:

Basically anything above and below water line will get squished or “pulled” to the water line.

I think this might be one of the answers but lmk.

[LOL_fun26]

Anyways tysm for sharing your idea imma try it out and let everyone know tmr (cuz my timezone is at gmt+8)