Caleb wrote in another post about the edgeMode features and “wrap” and “clamp” this:
Anyhow, the coolest thing in the update (IMO) is the new edge mode feature. You can set a tile layer’s “edgeModeX” or “edgeModeY” properties to control how the tile layer’s culling/drawing is done. To make tiles in a layer wrap around in the X-axis when the culling reaches the edge, you set “edgeModeX” to “wrap”. A value of “clamp” will clamp to the farthest tile in either dimension, and “stop” (the default) will stop drawing when it reaches the edge.
I can’t get this to work and need some more info on if this is still done this way.
Any help welcome.