;D

@☬ ᏝᏆᏁᏨᎾᏝᏁᏰᏒᎬᎳᏕᎿᎬᏒᎱᎯᏁ ☬
No prob :D

Sooo … Not Inkscape’s Path > Difference I use, but basically the Adobe version. Close enough :D

Thank you for this reference guide :3

@Badumsquish  
And neither have most of the developers of these expensive software either. – We should inform them.
 
Game Maker’s built-in sprite editor allows you to choose an opacity value from 0–255. …Game Maker does this correct and not Photoshop.

@PegaSUS  
:P
 
@Bongo  
Yeah, I usually cheat and use opaque outlines for Luna’s mane :D
 
Though, you can use a mask to do it if you really want to. I just hate masks because of how disagreeable they are.
 
@Liggliluff  
…Huh. I never even considered that :P

What irks me with most software is that the transparency is set with a percentage from 0–100 with no decimals (101 levels); but transparency has as many levels as each colours have, ie 256. The percentage needs to have 1 decimal (1001 levels).
 
It would go 0% 0.3%, 0.7%, 1%, 1.5%, 2%, 2.3%, 2.7%, 3%, 3.5%, … it would round to the nearest value. You can by this reach all 256 different values. You can still use whole numbers if you want.

What I used to do was make the outlines normally using the pen tool in Photoshop, but then I’d just use a paint tool and color it in like a coloring book with the paint layer being behind the outline layer. If you were to make the outline transparent or even nonexistent they’d just look like a bloby lump and not a clean as shown in the pic. It wasn’t that big of an issue during Season 1 where everything pretty much had opaque outlines to it. Then characters like Princess Luna, the Breezies, and the Crystal Ponies were introduced and my rather sloppy-just-and-hide-it-behind-the-outline method just didn’t work anymore for those characters.