Purple outline with rotosprite

[AlienMenace]

Anybody know why a 1-pixel purplish outline is showing up when using rotosprite? The image displays fine when using drawsprite.

[Ian Price]

You need to use SMOOTHSHADING FALSE prior to using ROTOSPRITE to get rid of this - it's anti-aliasing, to make the image appear smoother, getting muddled with the mask colour.

[Kitty Hello]

or make the transparent pixels with the colour you want and add an alpha layer to the png.