[REQUEST] Temporary Edge Duplication for World Wrapping

[F0XShadow]

Just made this GitHub account to leave this request.
My first post ever, so delete if this isn't the right place.
Goal: Make the map appear to wrap.
When the player hits the edge of the map, I instantly re-position them to the opposite side. That's easy.
The issue is that this is visually jarring.
What I need is for the tiles from the opposing sides of the tilemap to be partially generated a certain amount of tiles out from the edge to make it appear like it's wrapped. That way the player can't tell they were suddenly re-positioned.
I've done this with my own smaller maps, but with the complexity of Gaea plus the threaded chunk generator, I'm lost on how to implement it myself.
Thank ya!