local Pl = game:GetService("Players")
local Rs = game:GetService("RunService")

local pl = Pl.LocalPlayer
local ig = false
local cp = {}

local function iG(pt)
    local nm = pt.Name:lower()
    
    if nm == "baseplate" or nm == "terrain" or nm == "ground" or
       nm == "floor" or nm == "base" or nm == "road" or
       nm == "street" or nm == "path" or nm == "grass" then
        return true
    end
    
    if pt.Size.Y <= 5 and pt.Position.Y < 10 then
        return true
    end
    
    if pt:IsA("Terrain") then
        return true
    end
    
    return false
end

local function iP(pt)
    for _, p in pairs(Pl:GetPlayers()) do
        if p.Character and pt:IsDescendantOf(p.Character) then
            return true
        end
    end
    return false
end

local function eG()
    if ig then return end
    ig = true
    cp = {}
    
    for _, pt in pairs(workspace:GetDescendants()) do
        if pt:IsA("BasePart") and not iP(pt) and not iG(pt) then
            if pt.CanCollide then
                cp[pt] = true
                pt.CanCollide = false
            end
        end
    end
    
end

local function dG()
    if not ig then return end
    ig = false
    
    for pt, _ in pairs(cp) do
        if pt and pt.Parent then
            pt.CanCollide = true
        end
    end
    
    cp = {}
end

local function iM()
    local ch = pl.Character
    if not ch then return false end
    
    local hu = ch:FindFirstChildOfClass("Humanoid")
    if hu and (hu.Sit or hu.SeatPart) then
        return true
    end
    
    local rt = ch:FindFirstChild("HumanoidRootPart")
    if rt then
        for _, we in pairs(rt:GetChildren()) do
            if we:IsA("Weld") or we:IsA("WeldConstraint") or we:IsA("Motor6D") then
                local ot = we.Part0 == rt and we.Part1 or we.Part0
                if ot and not ot:IsDescendantOf(ch) then
                    return true
                end
            end
        end
    end
    
    return false
end

local ls = false
Rs.Heartbeat:Connect(function()
    local mt = iM()
    
    if mt and not ls then
        eG()
        ls = true
    elseif not mt and ls then
        dG()
        ls = false
    end
end)

pl.CharacterAdded:Connect(function()
    ig = false
    ls = false
    cp = {}
end)