Now, a longtime makeup artist secret is revealed: Tight-lining. What is it? Lining the upper lash line to create the illusion of fuller lashes and more defined eyes. Now L'Oreal's Voluminous Butterfly Sculpt Mascara does it for you. Use this mascara for an intense tight-line effect at the roots and fanned out volume at the tips. The smaller and tighter bristles come as close as possible to the lash line filling in between the roots to deposit maximum volume for a no-gap tight-liner effect.