Technical & Roblox Architecture

1. Network Ownership & Vehicle Replication

To ensure smooth 60 FPS vehicle handling without perceptible network latency, the game uses Roblox’s native Network Ownership delegation:

sequenceDiagram
    autonumber
    actor Player
    participant Client as Local Player Client
    participant Server as Game Server
    participant Storage as ProfileService Database

    Player->>Client: Interacts with Vehicle Prompt
    Client->>Server: RequestVehicleEnter(vehicleModel)
    Server->>Server: Validate Distance & Ownership
    Server->>Server: vehicleSeat:SetNetworkOwner(Player)
    Server-->>Client: Network Ownership Granted
    Note over Client: Physics calculated 100% locally with zero input lag!
    Client->>Server: Periodic State Sync (Position, Speed, Fuel)
    Player->>Client: Completes Delivery Job
    Client->>Server: RequestJobCompletion(jobId)
    Server->>Server: Validate GPS path & time delta
    Server->>Storage: Increment Cash & Rep atomically
    Server-->>Client: Payout Confirmed Toast

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2. Server-Authoritative Anti-Cheat Boundaries

1. Transaction Integrity: The client never directly dictates currency or vehicle inventory. The server validates all job completions by checking reasonable minimum travel times between pickup and dropoff points.
2. Physics Sanity Checks: If a client’s reported vehicle position moves faster than the theoretical top speed plus a tolerance margin, the server flags the session and snaps the vehicle back.

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3. Data Persistence Schema (ProfileService)

local PlayerDataProfile = {
    Cash = 15000,
    Reputation = 0,
    CurrentVehicleId = "kanto_compact",
    OwnedVehicles = {
        ["kanto_compact"] = {
            Odometer = 0,
            Upgrades = {
                Engine = 1,
                Suspension = 1,
                Tires = 1,
                Turbo = 0,
            },
            Customization = {
                BodyColor = "#F59E0B",
                WheelColor = "#1E293B",
                WindowTint = 0.2,
            }
        }
    },
    DiscoveredPOIs = {},
    Settings = {
        SpeedUnit = "MPH",
        SteeringSensitivity = 1.0,
        CameraDynamicTilt = true,
    }
}

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4. StreamingEnabled & Mobile Performance Targets

• StreamingEnabled: Active with StreamOutBehavior = LowMemory and TargetRadius = 512, MinRadius = 128.
• LOD Models: Vehicles drop high-poly wheel meshes and interior trim when distance exceeds 100 studs.
• Draw Call Budget: Maximum 2,500 draw calls per frame on mobile screens.