I'm rendering tiles using .ter files created using software for a flying simulator and have now come up with some problems, I'm using Terragen v0.9.43.0 when I render tiles at 512, 1024 or 2048 no problem at all, if I render a tile at 4096 x 4096 there is a black line that is 1 pixel in height, if I render at 8192 x 8192 then the black line is 3 pixels in height, I have never have this problem before and trying to work out why this is but only when rendering tiles at 4096 or 8192, have double check the setting and are correct, any help will be most welcome.
Thank you.