v1.1.0 the Underglow Kit, a garage upgrade

New: the Underglow Kit, a garage upgrade

Buy underglow for each car in the garage: Upgrades > Custom upgrade > Aero and Appearance > Underglow Kit.

• Seven kits: Front, Back, Sides, Front and Back, Front and Sides, Back and Sides, and Front, Back and Sides. Only the parts in the car's kit light up. Stock has no underglow.

• Three LED levels for every kit:

  Level	Price	LEDs (side / front / rear)
  Lv1	the kit's price	10 / 6 / 6
  Lv2	+600 CR	15 / 9 / 9
  Lv3	+1,200 CR	20 / 12 / 12

  Lv1 prices go from 1,000 CR (Front, Back) to 3,000 CR (Front, Back and Sides).

• Live preview: the highlighted kit lights up on your car in its own colors and effects, and the camera glides to a view of that kit. Back out without buying and the car shows its own kit again.

• Bought kits stay bought: switching back to one you already own is free.

• Require Underglow Kit (Mods page, or RequireKit in the ini): turn it off to let every car light every part, as in 1.0.

Each car remembers its own setup

• Kit, colors and effects are saved for each car. Colors and effects you choose in ANNA apply to the car you're driving.
• Cars you haven't set up use the colors and effects in Underglow.ini.
• Where it's saved: data\titles\1A96545B\Underglow\player-N\UnderglowGarage.json, beside your saves.

ANNA

• Parts the car's kit doesn't have are grayed out, under Car > Underglow > Parts and under Effect.
• On a car with no kit, Car > Underglow and Car > Lights > Underglow On/Off are grayed out.

Fixes

• High speed: the underglow no longer trails behind the car.
• Cars whose lights are all at the back (such as IndyCars): the underglow now spans the whole car instead of bunching up at the rear.

Changed defaults

• Effect: Rainbow Wave on all parts.
• Brightness: 0.25.

Please note

• Every car starts on Stock. With Require Underglow Kit on, a car has no underglow until you buy it a kit.
• Kits you buy are recorded in your game save and stay in its list of bought parts if you uninstall Underglow. Back up your saves before uninstalling.
• Prices can be changed in Underglow.ini under [Upgrade]: Price1–Price7 set each kit's Lv1 price, and LevelPrice the step per level. Changes apply at the next game start.

v1.0.2

The neon itself hasn't changed in this release.

Updating from 1.0.1

• Extract the zip into the folder with azimuth.exe, as before. It contains DWrite.dll and fh2-mods\Underglow.dll.
• Leave your fh2-mods\FH2ANNA.dll where it is. The zip doesn't include it, so it won't overwrite it. To get the new ANNA, update it from its own releases.
• Your Underglow.ini settings are kept.

Without FH2 ANNA

Underglow still works. You can switch it on and off, along with each part and the colors, on Pause > Settings > MODS. Effects are set in Underglow.ini or with the effect command.

v1.0.1 Hotfix

A small fix: a new Underglow.ini now starts with the settings 1.0.0 was supposed to ship with.

🔧 Fixed

• The ini created on first start had the old test values, which made the underglow too bright, too high and spread too far. The new defaults are:
  • Brightness 0.5
  • Height 0.01: right down by the road
  • FrontInset 0.5, RearInset 0.7
  • SideOffset -0.2, SideTrim 0.8: side strips tucked under the car and clear of the wheels
  • Range 1, Power 4: a tighter, stronger glow
• [Language] Last=EN is now in the ini from the start.

📦 Updating

Replace fh2-mods\Underglow.dll with the new one.

⚠️ Your existing Underglow.ini is kept as it is, so it still has the old values. To get the new defaults, delete fh2-mods\Underglow.ini before starting the game (you'll need to set your colors and effects again). You can also change just the keys above by hand.

v1.0.0 Underglow

Neon underglow for Forza Horizon 2 on PC (Azimuth), made of the game's own lights, so it actually lights up the road under your car.

Highlights

• 61 effects in four groups: Audio Visualizer, Effects with 1 Color, Effects with 2 Colors and Multicolor Effects.
• Reacts to your car radio: 15 audio effects follow the music. The rear shows the bass, the sides the mids and the front the treble. They only listen to your car radio (stock stations and Xbox Music). The engine, the tires and the festival's stage music don't move them, and a radio that's off stays dark.
• Primary and Secondary Color: 18 built-in colors plus 10 custom colors of your own (RGB 0–1, 0–255, or hex like #FF69B4, with your own names).
• Every part on its own: front, rear, left and right can each play their own effect, or be switched off (side underglow only, say).

Installing

You need Azimuth 1.0.1 or later. Extract Underglow-v1.0.0.zip into the folder with azimuth.exe:

DWrite.dll                 the FH2 Mod Platform
fh2-mods\Underglow.dll     Underglow
fh2-mods\FH2ANNA.dll       FH2 ANNA, the in-game menu

If you already have a newer FH2 ANNA, skip FH2ANNA.dll when extracting.

Using it

• FH2 ANNA (D-pad down):
  • Car > Lights > Underglow On / Off
  • Car > Underglow > Primary Color, Secondary Color, Effect, Parts
• Pause > Settings > MODS: Underglow on/off, each part on/off, and the two colors.
• fh2-mods\Underglow.ini: every setting, including the 10 custom colors and the neon's shape (how many lights, how far they stop short of the wheels, and more). Saving it while the game runs applies the changes within half a second.

Known issues

• At very high speed the underglow can trail slightly behind the car.
• Czech and Hungarian show the menus in English, as the game itself does in those languages.
• Without FH2 ANNA, effects can only be chosen in Underglow.ini or with the effect command. A Mods page list can't fit all 61.