Short definition: LOD, or Level of Detail, is a graphics technique that uses simpler versions of a 3D model or scene element as viewing distance increases to improve performance.
Detailed explanation: In flight simulation, LOD controls how much geometric and visual detail is shown for aircraft, buildings, terrain objects and other scenery items depending on how far they are from the camera. Close objects are rendered with more detail, while distant objects use reduced complexity because fine features are less noticeable at range. This helps reduce the load on the CPU and GPU, which can improve frame rate and smoothness, especially in dense scenery or around detailed airports. LOD settings may affect model shape, texture clarity, object draw distance and the point at which scenery appears or changes detail.
Key considerations:
- A lower LOD setting can reduce visual quality by making objects look simpler or appear later in the distance.
- A common mistake is assuming LOD only affects texture sharpness when it also affects model complexity and object visibility.
- Poorly tuned LOD can cause noticeable pop-in, which affects immersion and can make airports or traffic harder to spot at a distance.
Further Reading: Level of Detail – Wikipedia
