FF4 complete collection world map tearing and delayed texture resolution

[LunaMoo]

It's simple - don't use texture scaling, it rarely works well in 2D games and by design breaks tileset based sprites so turning it off will solve your problems.

Imagine a simple texture made of lots of tiny squares, when you use texture scaling, those squares will blend with each other on the edges creating differently colored lines, that's how such algorithms work by design and you'll not be able to do anything about it.
Also texture scaling is delayed if there are too many textures to scale(alternative to a delay would be long freeze) or when they're unstable/constantly changing which tilesets textures usually are;p, it doesn't matter what pc you have, there are no pc's available which could easily handle texture scaling in real time.

If you really want to scale 2D games, you can just use upscaling post process shader like 5xBR instead which does have a few downsides, but still will be much better than per texture scaling.