Performance loss is not so serious,
when you manage properly each LOD distance meter values and decreasing polys / texture resolutions.
I often set LOD0 distance at 100 meters.
High detailed tire or engine bonnet, wing (fender) models are shown only times of the camera is near than 100m from the car.
From fly-by aircrafts' cockpit view to the car, passing seconds nearer than 100m maybe very short. FPS damage will be not so serious.
I like vehicles' LOD steps as 100, 200, 500 (or 400), 2000. Only when I want to one more step, insert 800 or 1000 between 500 (400) and 2000.
So, 200m's LOD1 model or 500m's LOD2 model have to be made carefully for balance of quality and rendering performance.
When you are afraid even 100m too higher detailed, change their steps like 80, 160, 400, 1000, 2000 or 60, 120, 300, 900, 2000.
How long distance players see from / which LOD model is shown and how it looks ..... easily checked by FMB, 3D view camera moving by mouse drag. Flying a mission is not needed until the final check.
My made aircraft ordnances are in different LOD steps.
Those bombs / racks have steps of 50, 250, 750, 2000 meters.
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