Mask Outline: Possible to create sharp corners?

Hello ​@Martel6ix,

Due to the nature of the Path, a Mask outline can’t create sharp vertices with big shapes. Mask outlines behaves like a distance node would. 

I advise you to duplicate the initial Path, switch its type for “Ribbon” and make sure its corner parameter is set to “Mitter join”. The result will be as followed:

You’re kind of losing the procedural aspect, but if you’re moving the initial path, you can copy it and paste its vertices only in the Ribbon:
 

Hope this helps.