Lack of smooth overlapping between textures when using custom terrain textures

The top image shows the native terrain texture in roblox - there is a smoothed overlap. the bottom shows a custom texture. No smoothing, and it looks horrible.

Does anybody know of a way to get smooth overlaps using custom terrain textures?

Do you have “Material Pattern” in “Organic” by any chance?
image

So, uploading my texture files as transparent pngs instead of jpegs to roblox helped a great deal. But, the custom textures are still a lot more jaggy than the native textures. Its especially visible at a distance. I would like to know why

Could it just be the color matching?

EDIT: I tried tinting the native textures, but they still overlaps smoother than custom textures, so its not just the color matching