Landscape lightmap problem
Rebuild the lighting for your scene and these lines should disappear. Let me know if this resolved your issue, or if you need additional assistance.
I also noticed you added the Landscape Grass Type to the tags of this post, and just for your own information if you plan on using this foliage feature, it currently does not support Static (Baked) Lighting. We are working now to have this feature implemented at some point for an upcoming release.
This means, if you want to have accurate lighting and shadows for your foliage landscape grass type assets, you will want to set your Directional light to Stationary (Supports Static and Dynamic Shadows), or Movable (Fully Dynamic).
Let me know if you still need further assistance.
answered Dec 04 '15 at 07:43 PM
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