Rotosplines..

[rdarkside]

Now i was just doing my roto for the dreseden dolls shot from siliconimaging.com and while rotoshaping whenever i moved the point outside the character's border the spline looked something like this...

1.jpg is the one i talked abt right now..

when i moved the spline inside or on the border of the character it looked black..the spline color looked black..is it something like a warning of jitters or boils??

or what is it...??

Now apart from this i've been posting quite a lot of questions now...some may have been really silly like this one...but please bear with me coz i am interested in visual effects....