Actually not so far distance, just meters. Projectile (emissive yellow, high speed) is good visible at close distance, but at distance about 10 meters became very thin, and further disappears completely.
I tried tuning of LOD settings, Post process bloom - nothing helps.
I need good visible projectile at distance ~ 100-300 m, how to do this?
Sometimes you can get problems similar to this due to the mipmaps on your texture.
When the object is painted far away, or too quick, the engine use the mipmaps instead the original texture, and that can ruin your texture or alphas. Select your textures in the content browser and doubleclick, and put “no mipmaps” on them, if they move fast or to far away, and that can solve your problem.