Export overlapped tiles
If you're interested in exporting seamlessly tiled terrain for 3rd party renderers, you may wish to have a look at L3DT Professional v14.11 developmental build 1 (on the Pro downloads page now), which includes a new 'File->Export->Export overlapped tiles
' menu option. This feature allows you to export any map layer as a set of ovelapping tiles, where each tile contains one extra row/column of data taken from the first row/column of the neighbouring tiles. The user guide is here
Please note that this feature pretty much replaces both the 'Duplicate tile borders
' and 'Grow tile size by one
PS: I don't expect to make any further changes before L3DT release 14.1X, so if you're eager to get the next release early, you can get it by downloading this developmental build.