Buildings And Airports

Buildings & Airports Explained

Estimated Lesson Time: 35–45 Minutes

Lesson Overview


Throughout this module we’ve explored many of the graphics settings that influence Microsoft’s Flight Simulator’s performance.

Today we’re going to look at one of the busiest and most demanding environments in the simulator:

Airports.

Large airports contain thousands of individual objects.

Every terminal…

Every jetway…

Every parked aircraft…

Every baggage cart…

Every airport worker…

Every fuel truck…

Every light pole…

must be loaded, managed and rendered.

This is why airports are often the most demanding locations in Microsoft Flight Simulator.

Understanding these settings will help you optimise airport performance without sacrificing unnecessary visual quality.

Lesson Objectives

By the end of this lesson you will understand:

How Building Quality affects performance.

How Airport Detail works.

How scenery objects affect CPU and GPU usage.

The impact of static aircraft.

The effect of ground vehicles.

How airport worker density influences performance.

Which settings are worth reducing first.

How to optimise airports for smooth operations.

1. Buildings

Buildings make up a significant portion of every airport.

Examples include:

  • Passenger terminals.
  • Hangars.
  • Cargo buildings.
  • Maintenance facilities.
  • Control towers.
  • Fire stations.
  • Parking garages.
  • Airport hotels.

Higher Building Quality increases:

Building detail.

Window detail.

Roof detail.

Architectural complexity.

Visual realism.

Low Building Quality

Simpler buildings.

Lower polygon count.

Less detailed terminals.

Lower GPU workload.

High Building Quality

Highly detailed terminals.

Realistic architecture.

Sharper building models.

Greater immersion.

Higher GPU workload.

Performance Impact

Buildings affect both CPU and GPU.

CPU:

Loads and manages building placement.

GPU:

Renders every visible building.

Example

Compare London Heathrow with a small regional airport.

Heathrow contains hundreds of large buildings.

A small regional airport may contain fewer than twenty.

The workload is vastly different.

2. Airport Detail

Airport Detail controls the amount of scenery and detail displayed around airports.

Examples include:

  • Jetways.
  • Lighting.
  • Service equipment.
  • Gates.
  • Airport signs.
  • Aprons.
  • Ground markings.
  • Fences.
  • Light poles.
  • Static equipment.

Higher Airport Detail creates richer environments.

Lower Airport Detail simplifies the airport scenery.

Low Airport Detail

Cleaner airports.

Fewer scenery objects.

Improved performance.

High Airport Detail

Highly detailed airport environments.

Greater realism.

Increased CPU and GPU workload.

Performance Impact

One of the largest combined CPU and GPU settings around airports.

The CPU manages thousands of objects.

The GPU renders them.

3. Airport Objects

Airports contain thousands of individual scenery objects.

Examples include:

  • Jetways.
  • Fuel tanks.
  • Baggage carts.
  • Cargo containers.
  • Light poles.
  • Air conditioning units.
  • Airport signs.
  • Cones.
  • Safety barriers.
  • Ground equipment.

Each object may appear insignificant…

But together they create one of the busiest scenes in the simulator.

Why Objects Matter

Every object must be:

Loaded.

Positioned.

Lit.

Shadowed.

Rendered.

This happens continuously as you taxi around the airport.

Performance Impact

Moderate CPU.

Moderate GPU.

Thousands of small objects quickly increase workload.

4. Static Aircraft

Static aircraft are parked aircraft that never move.

They exist purely to make airports feel busy.

Examples include:

Airliners.

General Aviation aircraft.

Business jets.

Military aircraft (where included).

These aircraft increase immersion.

However…

Each one adds extra geometry, textures and shadows that must be rendered.

Low Static Aircraft

Cleaner airport.

Lower GPU usage.

Better FPS.

High Static Aircraft

Busy airport atmosphere.

More realistic gates.

Higher GPU workload.

Higher VRAM usage.

Performance Impact

Mostly GPU.

Some CPU workload for managing additional aircraft objects.

Important Note

Many users also use traffic add-ons such as FSLTL or AIG. If those are running alongside high levels of static aircraft, airports can become unnecessarily crowded and performance may suffer.

5. Ground Vehicles

Ground vehicles include:

  • Fuel trucks.
  • Catering trucks.
  • Pushback vehicles.
  • Baggage loaders.
  • Airport buses.
  • Maintenance vehicles.
  • Follow-me cars.
  • Fire vehicles.

These vehicles move around the airport during normal operations.

Unlike static objects…

They constantly update their position.

Why They’re Demanding

The simulator must continually calculate:

Vehicle movement.

Pathfinding.

Collision avoidance.

Lighting.

Shadows.

Animations.

This increases CPU activity.

Performance Impact

Mostly CPU.

Moderate GPU rendering.

Busy airports with many moving vehicles can noticeably increase MainThread workload.

6. Worker Density

Airport workers help make airports feel alive.

Examples include:

Ramp workers.

Marshals.

Ground crew.

Maintenance staff.

Baggage handlers.

Fuel operators.

Higher Worker Density creates a more active airport environment.

Why Workers Affect Performance

Every worker includes:

A 3D model.

Animations.

Movement.

Lighting.

Shadows.

The simulator constantly updates these animations.

Low Worker Density

Cleaner airport.

Higher FPS.

Less activity.

High Worker Density

Lively airport.

Greater immersion.

Higher CPU workload.

Performance Impact

Mainly CPU, with additional GPU work for rendering the character models and animations.

7. Why Airports Are So Demanding

Large international airports combine almost every demanding feature in the simulator.

Examples include:

Thousands of buildings.

Thousands of objects.

Static aircraft.

AI traffic.

Ground vehicles.

Animated workers.

Glass terminals.

Lighting.

Reflections.

Weather.

Shadows.

Photogrammetry.

Complex aircraft.

All of these systems work together.

This is why airports are often the lowest FPS locations in Microsoft Flight Simulator.

8. CPU vs GPU Impact

Airports are unusual because they heavily load both the CPU and GPU.

The CPU must:

Load scenery.

Manage thousands of objects.

Control AI.

Animate workers.

Move vehicles.

Update airport systems.

The GPU must:

Render every object.

Render textures.

Render shadows.

Render lighting.

Render reflections.

Render aircraft.

This is why reducing airport-specific settings can often improve smoothness without noticeably affecting the rest of your flight.

Performance Summary


Setting

CPU Impact

GPU Impact

Buildings

Medium

High

Airport Detail

High

High

Airport Objects

Medium

Medium

Static Aircraft

Low–Medium

High

Ground Vehicles

High

Medium

Worker Density

Medium

Low–Medium

9. When Should You Increase These Settings?

Increase airport detail if:

  • You mainly fly airliners.
  • You enjoy realistic airport environments.
  • You create screenshots.
  • You have a powerful CPU and GPU.
  • You value immersion during taxi and turnaround.

10. When Should You Reduce Them?

Reduce airport settings if:

  • You are MainThread limited.
  • Taxiing causes stutters.
  • FPS drops significantly at large airports.
  • Your GPU is heavily loaded.
  • You use AI traffic add-ons alongside static aircraft.
  • You rarely notice extra airport scenery during normal operations.

Ground vehicles, worker density and static aircraft are often among the first settings to reduce if you need better airport performance.

11. Common Myths

Myth 1

“Buildings are the only reason airports are demanding.”

False.

Vehicles, workers, AI traffic, objects and aircraft all contribute significantly.

Myth 2

“Static aircraft don’t affect FPS.”

False.

Every parked aircraft requires geometry, textures and shadows to be rendered.

Myth 3

“Ground vehicles only affect the GPU.”

False.

Their movement and pathfinding create additional CPU workload.

Myth 4

“Airport Detail only changes visuals.”

False.

Increasing Airport Detail increases the number of objects the simulator must manage and render.

Student Exercise

Today we’re going to compare airport settings.

Step 1

Load your Module 1 benchmark flight.

Use:

  • Same airport.
  • Same aircraft.
  • Same weather.

Choose a large international airport for the most meaningful comparison.

Step 2

Compare:

  • Airport Detail.
  • Static Aircraft.
  • Ground Vehicles.
  • Worker Density.

Step 3

During each test, record:

  • Average FPS.
  • Lowest FPS.
  • MainThread status.
  • CPU utilisation.
  • GPU utilisation.
  • Taxi smoothness.
  • Airport realism.
  • Overall immersion.

Step 4

Compare the results.

Ask yourself:

  • Which setting had the biggest impact on FPS?
  • Which setting improved realism the most?
  • Which setting could be lowered with the least noticeable visual difference?
  • Which combination provides the best balance between realism and performance?

Student Checklist

Building Quality tested.

Airport Detail compared.

Static Aircraft evaluated.

Ground Vehicles reviewed.

Worker Density compared.

CPU utilisation monitored.

GPU utilisation monitored.

Best airport settings selected.

Lesson Summary

Congratulations.

You now understand how airport-related graphics settings influence performance in Microsoft Flight Simulator.

Remember:

  • Buildings and Airport Detail define the visual complexity of airport environments.
  • Thousands of airport objects contribute to realism but increase CPU and GPU workload.
  • Static aircraft improve immersion but consume GPU resources and VRAM.
  • Ground vehicles and airport workers add life to airports but increase CPU workload through movement and animations.
  • Large international airports are among the most demanding environments because they combine many complex systems.
  • Optimising airport settings can provide significant performance improvements while maintaining an immersive experience.

Knowledge Check

  1. What does Airport Detail control?
  2. Why do large airports place such heavy demands on both the CPU and GPU?
  3. How do static aircraft affect performance?
  4. Why are ground vehicles more CPU intensive than many people expect?
  5. What effect does Worker Density have on airport realism and performance?
  6. Which airport settings would you reduce first if you were MainThread limited?
  7. Why should AI traffic add-ons and static aircraft be balanced carefully?
  8. Based on your benchmark testing, which airport settings provided the best balance between realism and smooth performance for your system?
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