Roblox Script Generated by ScripterAI

"add more materials but the footsteps only work for a split second then go to the basic roblox plastic footsteps"

To fix the issue of the custom footstep sounds only playing for a split second before reverting to the default Roblox plastic footsteps, you can try adjusting the footstep sound's `PlaybackSpeed` and `Volume` properties.

However, it's important to note that the Roblox engine has built-in footstep sounds that play automatically when a character walks on different materials. These sounds can interfere with your custom footstep sounds.

Unfortunately, there is currently no official way to disable the built-in footstep sounds in Roblox. You might need to use a workaround, such as changing the material of the baseplate to a material that has no footstep sound (like `Enum.Material.Neon`), and then using your own footstep sounds.

Here's an updated version of your script with some tweaks:

```lua
-- This script should be placed in StarterCharacterScripts 
local humanoid = script.Parent:WaitForChild("Humanoid")

local footstepSound = Instance.new("Sound") 
footstepSound.Parent = script.Parent:WaitForChild("HumanoidRootPart")

local footstepSounds = {
	Wood = "rbxassetid://2812419402",
	Metal = "rbxassetid://6876957898",
	Concrete = "rbxassetid://5761648082",
	Grass = "rbxassetid://6501217328",
	Sand = "rbxassetid://8453417974",
	Snow = "rbxassetid://8453425942",
	-- Add more materials and their corresponding sound IDs here
}

local function playFootstepSound() 
	if humanoid.MoveDirection.Magnitude > 0 and humanoid.FloorMaterial ~= Enum.Material.Air then 
		footstepSound.SoundId = footstepSounds[humanoid.FloorMaterial.Name] or footstepSounds["Concrete"] -- Default to concrete sound if no match found
		footstepSound:Play() 
	end 
end

humanoid.Running:Connect(function(speed) 
	-- Adjust the PlaybackSpeed of the sound according to the WalkSpeed 
	footstepSound.PlaybackSpeed = speed / humanoid.WalkSpeed 
	footstepSound.Volume = 1 -- Adjust the volume as needed
	playFootstepSound() 
end)
```

Remember to replace "your_id_here" with the actual asset ID of the sound you want to use for each material.