How do I increase FS2004 autogen and scenery draw distance?

To increase autogen and scenery draw distance in Microsoft Flight Simulator 2004 (FS9), enable Extended Terrain Textures and raise TERRAIN_DEFAULT_RADIUS in fs9.cfg. The default radius controls the autogen-bearing terrain area; the extended-radius settings draw lower-detail ground textures farther away, not distant airport or custom-building models.

How do I change the FS2004 draw-distance settings?

The safest method is to configure FS2004's display options first and edit fs9.cfg afterwards, because the simulator may rewrite terrain values when you change its menus.

1. Close FS2004. Never edit fs9.cfg while the simulator is running.
2. Set the in-game options. Under Settings > Display > Scenery, enable Extended Terrain Textures if available. Choose the Autogen Density and Scenery Complexity appropriate for your PC, remembering that these sliders change object quantity rather than the underlying draw radius.
3. Back up fs9.cfg. On most Windows installations, enter %APPDATA%\Microsoft\FS9 in File Explorer and copy fs9.cfg somewhere safe. This is the per-user configuration file, not a similarly named file in the FS2004 installation directory.
4. Edit the existing [TERRAIN] section. If your current default radius is lower, these values provide a sensible first trial:
   • TERRAIN_EXTENDED_TEXTURES=1
   • TERRAIN_DEFAULT_RADIUS=6.500000
   • TERRAIN_EXTENDED_RADIUS=4.500000
   • TERRAIN_EXTENDED_LEVELS=4
5. Save and test one repeatable flight. Use the same aircraft, airport, weather and view while checking autogen pop-in, ground sharpness, frame rate and pauses.

Modify the existing lines rather than creating a second [TERRAIN] section. We also advise against making fs9.cfg read-only: that can stop FS2004 saving legitimate control, display and sound changes. Our guide to the other useful FS9.cfg graphics controls explains the related terrain and texture entries without relying on extreme copied configurations.

Which setting controls autogen versus distant scenery?

TERRAIN_DEFAULT_RADIUS is the main practical control for retaining detailed terrain tiles and their attached autogen around the aircraft, while extended-terrain entries chiefly affect distant ground textures.

A mistake we see constantly is raising TERRAIN_AUTOGEN_DENSITY manually and expecting a longer range. It only increases the number of objects, so use the in-game slider and do not enter unsupported values above those FS2004 writes itself.

How far should I increase the terrain radius?

A TERRAIN_DEFAULT_RADIUS of 6.500000 is a reasonable first increase when the existing value is lower; 9.500000 is an aggressive trial for a system that remains smooth and keeps textures sharp.

The radius number should not be read as miles or nautical miles. Increase it in stages, and keep the lowest value that removes the objectionable pop-in. Larger numbers make FS9 retain and load more terrain, which can cause blurry textures, stutters or memory pressure without producing a worthwhile visual gain.

If you need to trade detail against performance, our practical FS2004 graphics and FPS settings cover the scenery-complexity and autogen choices that should accompany the radius change.

Why does FS2004 autogen still pop in or disappear?

Some tile-edge pop-in is normal in FS2004 because the engine creates autogen in terrain blocks rather than maintaining unlimited 3D coverage.

• No autogen anywhere: this is not a draw-distance problem. Check the density slider, texture installation and configuration using our diagnostic steps for missing FS2004 autogen.
• Autogen ends at a photoreal boundary: photo scenery normally needs matching .agn annotation files. A larger terrain radius cannot create buildings or trees where the scenery package supplies no autogen data.
• Airport buildings appear only when close: the add-on's model-detail levels and visibility design may be responsible. Raise Scenery Complexity, but terrain-radius edits cannot override every model.
• Distant terrain remains hidden: check weather visibility and haze. Configuration changes cannot draw scenery beyond the active visibility limit.

What should I reduce if performance gets worse?

Lower Autogen Density first when FPS falls over cities, but reduce TERRAIN_DEFAULT_RADIUS when ground textures become blurry or loading pauses increase.

• Low FPS with sharp textures: reduce Autogen Density or Scenery Complexity by one step.
• Blurry ground behind or beneath the aircraft: reduce TERRAIN_DEFAULT_RADIUS before changing mesh settings.
• Regular pauses while flying quickly: reduce both terrain radii and test again.
• Smooth performance but obvious nearby pop-in: increase only TERRAIN_DEFAULT_RADIUS in a small step.