This mod helps you to differenciate 6 cases of hitmarkers:

• the shape of the hitmarker tells if the hit was lethal or not ;
• the color indicates the type of damage inflicted: body shot, head shot or critical hit.

If none of the texture pleases you, you can add yours in the folder "PAYDAY 2\assets\mod_overrides\Enhanced Hitmarkers\guis\textures\pd2". You have nothing else to do: the texture lists of the option menu are done dynamically.