When I enable a film grain effect

		GetGame().GetWorld().SetCameraPostProcessEffect(camId, 10, PostProcessEffectType.FilmGrain, resource);

In-game, when I change the texture detail settings, the film grain disappears or appears more strong.
Raw images of the texture detail:

Because the film grain is more visible on a high gamma monitor settings,
Here are edited images to make it more obvious where the grain is: