Please explain projectile_trail_tables

[highsis]

Things I don't understand are:

duration, min_apparent_width_distance, fadeout_distance, distortion_cross_table_start_distance, and distortion_cross_fade_range.

I want to know what those do. For now I want to adjust the minimum distance at which projectile trails become visible. They become invisible when I zoom my camera in.

[Primergy]

Never worked with those, but the easiest way to find out which value does what, is to change them one by one to absurd numbers, go ingame and see what has changed.