Old/new chunk seam at oceans..?

[SpookiBoo]

I've come upon an interesting phenomenon. We're all familiar with chunk border seams when world generation gets touched on, especially with the smoothing introduced in 1.21.

I have a big ocean world made of mostly smaller islands, and there's some islands I wanted to preserve, but some untouched ones I wanted to regenerate with 1.21.

The landform seams are fine, if I really want to, I can smooth them out in WorldEdit. What I can't fathom is how to approach what I'm faced with in the image attached.

I can't be totally sure if this is a 1.20 thing, either. The image was taken with 1.21 and using wgen commands in that version, and as you can see, there's a water color seam.

Curious if anyone has faced or solved this. I'm super particular, so it's an eyesore, but I might be able to get over it. Just want to pose it to the community and see what happens.

[Professor Dragon]

That is  . . . odd. 

Try testing to see if the water seam difference is due to fresh vs salt water. You can place farmland and grow next to fresh water, but not next to salt.

I don't know what to do about that, if it is the case, but it may be what is going on.

Professor Dragon.

[Broccoli Clock]

10 hours ago, Professor Dragon said:

Try testing to see if the water seam difference is due to fresh vs salt water. 

Is it not simply the heat, rather than it be a salt/fresh water divide. I have (heh, had) a water world that was predominantly sea water, it's colour was defined by the heat. I only got "greener" ocean nearer the equator, and in turn those were the places with the new coral.

[SpookiBoo]

So it does seem to be saltwater versus stillwater... which is odd when they were initially oceans and are now being regenerated as stillwater.

I found that out by placing saltwater against blocks at sea level within the new chunk and finding they turned a darker blue than what came up.

Annoying, but it seems I can't do anything about it since I can't mass edit oceans. Thank you for the suggestions!