[Matrix89]

Yup, starting with 1.18 the started blending old chunks with the new ones. Earlier there was a hard transition, personally I prefered the hard cut, there was something to it, something mysterious about it, but I get why they wated it removed

[Alphaeus]

1.7 was actually the first version to support blending (for the new generator in that update). 1.18 is a new iteration of that.