@:
>The main things to check are that you’ve built your lightmaps with the hard edges snapping the grid for your target lightmap resolution (covered in the post above) and why is important.
I have similar problems.
In the post above you wrote that the grid should be 1/128 but on answerhub you wrote that it should be 1 / (128 - 2) for 128 resolution. Which one is correct?
Which padding should I use between UV shells? And how much padding between UV and the border?