Quote from Honeydrill
I would like to thank Emperor Doom for indirectly solving a problem that I was having! Since Solace is 32x, I have been texturing the items at the same resolution, however tools like swords and pickaxes didn't quite fit the theme of the pack as their edges were jagged, as opposed to straight.
After basking in the glory of the sword in the header-bar that Emperor Doom just posted, I realized a solution to my problem that was so obvious I face-palmed. All I have to do is raise the resolution.
64x still gave me the jagged-line problem, but 128x is perfect. Here's a VERY quick stone-sword mock-up to showcase my point:
Thing about that is, is if you have items that are 128x, it will upscale the terrain.png to that size too.