Description

NEW In Version 2.0:
Light props such as “tr_prop_wall_light_02a” are no longer required, as this update allows the script to spawn LOD lights that turn on and off in the animation. The brightness of the LODs can be adjusted in the NativeUI menu. In addition, all runways and the helipad can now be controlled individually via the NativeUI menu.

# ALSF-2 Ultimate – Airport Lighting System “The Rabbit”

A realistic approach lighting system for Los Santos International Airport (LSIA) and helipads in GTA V. This mod adds dynamic sequenced flasher (rabbit) lights to runways and strobe lighting for helipads.

## Features

Realistic Runway Approach Lighting**: ALSF-2 style sequenced flasher lights (rabbit lights) for all LSIA runways.
Optimized Sequencing**: **Fixed speed** of **2 complete runs per second** (regardless of runway length).
Multiple Runway Support**: Pre-configured lighting for runways 21, 12L, 12R, 33L, and 33R.
Helipad Strobe Lights**: Flashing perimeter lights for helipads (Strawberry Hospital included).
Individual Control**: Enable/disable each lighting system independently via in-game menu.
Customizable Settings**: Adjustable light intensity and visual parameters.
Extra Threshold Lights**: Additional lights at runway thresholds and REIL positions.

## Requirements

Script Hook V** (latest version)
Script Hook V .NET** (latest version)
NativeUI** (included or download separately)

## Installation

1. Make sure you have Script Hook V and Script Hook V .NET installed.
2. Copy `ALSF2_Ultimate.dll` to your `scripts` folder (create the folder if it doesn’t exist).
3. Copy `NativeUI.dll` to your `scripts` folder (if not already installed).
4. Launch GTA V.

## Usage
1. Press **F6** (default key) to open the menu.
2. Check the box next to any runway or helipad to activate its lighting system.
3. Adjust **Brightness** in the menu if needed.
4. The lights will automatically run in a continuous sequenced pattern.

### Menu Options

RWY 21 / 12L / 12R / 33L / 33R**: Toggle runway approach lighting on/off.
Strawberry Heli**: Toggle helipad strobe lighting on/off.
Brightness**: Adjust light intensity (e.g., 50, 100, 200, 350, 500).

Menu Key**: F6 (default).

## How It Works

### Runway Lighting (ALSF-2 System)

Lights spawn in a line from approach point to runway threshold.
The sequenced flasher animation runs **continuously without any pause** when enabled.
Fixed Sequence Speed**: The system dynamically calculates the flash interval based on the number of lights to ensure a constant rate of **2 full sequences per second**.
30-foot spacing between lights (realistic FAA standard).
Additional threshold and REIL lights at runway ends.

### Helipad Lighting

Single strobe light at helipad center.
5 flashes per cycle at 100ms intervals.
1-second pause between cycles.
Reduced intensity (25%) for realistic strobe effect.

## Performance

Lights are optimized with an LOD distance of 5000 units.
Props are made invisible to reduce visual clutter.
Only light effects are drawn (no physical objects visible).
Minimal performance impact.

## Known Limitations

Lighting systems are purely visual (no collision).
Works best at night or in low visibility.
Some runways may need manual adjustment for custom airport mods.

## Troubleshooting

Menu won’t open**: Make sure `NativeUI.dll` is in your scripts folder.
No lights visible**: Check that the system is enabled in the menu and try increasing **Brightness**.
Script crashes**: Ensure you have the latest Script Hook V .NET version.
Lights in wrong position**: This mod is designed for the default LSIA layout.

💡 Others also downloaded: Wasted Kick – Realistic Death, GUN Fight Response, Vehicle System Overhaul.

TRAILER 2: ALSF-2 sequenced flashing lights (SFL) script (Version 2.0)