How to use camera culling ?

Due to Blender limitation (version 4.3), you just need to copy some parameters of your active camera and output to the modifier. Let's do two thinks:

1. Focal lenght (in mm)
2. And output ratio - write ratio if you know it (ex: 16/9) or just write picture size (ex: 1920/1080)
3. Optionnal - Limit leaves in viewport. To keep Blender fast, you can limit in each model what you preview in the viewport. Type the number which will be x1000.
4. Optionnal - Camera distance allow to stop displaying leaves if your model is more than ###m. Good for very large model. Tip: Bake a texture for far away elements.

Of course, if your scene have few elements, you could simply disable this option.