Configuration

The game's own INI files and the settings in them. This covers vanilla configuration; T3SDK's own settings (T3SDK.ini) are documented in full in sdk.md, and this page notes only where T3SDK overrides a vanilla setting.

The config layer

Ion Storm's engine reads its INI files through its own singleton (Config::Instance, looked up by section and key: GetBool, GetFloat, GetString), not through stock Unreal's GConfig. A key can carry a platform suffix that is tried before the plain key: __p (PC), __x (Xbox), __t (Thief) — for example VersionWindow__p=VersionText overrides plain VersionWindow on PC specifically. See engine.md for the addresses.

The INI files

All of these live in System/, except options.ini (see below). Roles below are confirmed where a linked page has the evidence; the rest are not known beyond what the file's own name suggests.

File	Governs
DEFAULT.INI	Default settings; confirmed to suppress Dev* log categories (see engine.md's Logging section), and presumably much more.
T3UI.ini	Menu and popup window layout (see display.md).
T3UILights.ini, T3ItemGrid.ini, T3UISoup.ini	By name, layout for specific UI screens (lighting-related menus, inventory grids, and shared UI elements).
T3Hud.ini	The in-game HUD's own, separate layout (see display.md).
T3Camera.ini	By name, camera behaviour.
T3PhysicsSound.ini	By name, footstep and impact sound selection by surface.
T3PlayerAnims.ini	By name, player animation selection.
T3AutoTag.ini, MotionTags.ini	By name, motion-tag data alongside Content/T3/TagDatabase (see files.md).
T3InputMem.ini	By name, input configuration; not otherwise examined.
T3Rumble.ini	By name, controller vibration.
FacialExp.ini	By name, facial expression data.
reverbstyles.ini	EAX reverb presets (see architecture.md).
user.ini (install root, not System/)	Three engine switches: [BlockLoading] LoadFromResourceBlockFiles, [Source Control] UseSourceSafe and [Engine.Engine] UpdateGameSys. The exe names the file; how it combines with the other files is not known yet.
T3SDK.ini	T3SDK's own settings; see sdk.md. Not a vanilla file.

options.ini is different from the rest: it is written by the game itself, under <game folder>/save/SaveGames/User Options/options.ini (see files.md), and holds the player's saved audio/video choices, below.

options.ini and the Options table

Rather than named keys, options.ini stores the player's settings as a flat array of integers, indexed by position against a fixed table of 21 names:

Index	Name	Index	Name
0	Version	11	Resolution
1	Subtitles	12	ShadowDetail
2	InvertYAxis	13	Bloom
3	LookSpring	14	LightCutoff
4	Vibration	15	MultiSampling
5	SFXVolume	16	UseLowResTextures
6	MusicVolume	17	LOD
7	ControllerLayout	18	UseHWMixing
8	Brightness	19	UseEAX
9	VSynch	20	EAXMultipleEnvironments
10	AutoBowZoom

Options::Load, Save and SetDefaults manage the file; Get/Set read and write one entry by index. Resolution (index 11) is special-cased: Options::ApplyVideo clamps it to 0–4 and steps down to a mode the graphics adapter actually supports, indexing the five-entry resolution table below. Each row on the in-game Audio/Video options screen (a slider, a checkbox or a button) is driven from the same table by a shared refresh routine.

Notable sections

• [Physics]: PlayerControllerFPSrate (60) caps the player physics controller's step size. AIControllerFPSrate_Running (30), _Basic (15), _Minimal (5) and _Off (2) are stored as 1/rate for the AI's controllers; how they are used is not known yet. See architecture.md.
• [LoadingScreen]: the loading screen's logo and caption texture names and their positions and sizes, read by LoadingScreen::LoadLayout. See display.md.
• [WindowManager]: AssumedUIScreenWidth/Height (640x480, the UI's design resolution) and the UI camera's field of view (95 degrees). See display.md.
• [D3DDrv.D3DRenderDevice]: device-level switches such as UseComputedRefreshRate and UseManualRefreshRate, read while setting up a display mode.
• [Paths]: DynamicTextures, the folder LoadingScreen::Begin looks in for a per-map loading background (<map>.dds, falling back to Loading1.dds when there is none).
• [PCStartup]: ShowIntroMovies, which the retail game itself can set to skip the start-up logo movies (the list itself is ShortIntroMovies); T3SDK's SkipIntros fix instead hooks the function that plays them (see engine.md), independent of this key.
• [Flesh]: Multisample, read while setting up the backbuffer format.

What T3SDK overrides

T3SDK does not edit these files; it intercepts a few values in memory. See sdk.md for the settings that control each:

• The five-entry resolution table (NativeResolutions) is rewritten from the monitor's own modes instead of the stock 640x480–1600x1200 list.
• TimeManager's minimum frame step (SmoothFrames) is lowered from its compiled-in 0.01 s, independently of any INI key (see runtime.md).
• Config::GetFloat is intercepted for two things, both for WidescreenUI: [WindowManager] AssumedUIScreenWidth, answered with a widened value, and two [KeyboardLayoutWindow] ratios, scaled so the Inputs page's key table fits its 640-wide frame.
• Window::PlacedPosition is hooked, also for WidescreenUI, to move menu content into a centred 640-wide frame. See display.md.