Modifing FlxSprites

how exactly do i modify sprites (FlxSprites, they for some reason work very differently) like cropping, adding rounded corners and more?

Looks like this guy has wrestled with the mask idea a little while ago: http://coinflipstudios.com/devblog/?p=421
Does that help at all? I’m guessing you already read the documentation: https://haxeflixel.com/documentation/