Shadows blurry with high lightmap resolution?

My ground surface is rendering with blurry shadows even though the lightmap is set to 3000 pixels. Anyone have any solutions? Thanks

Example :


Big mesh is going to need big lightmap, that’s the problem.

Things you can try:

  1. Breaking it into smaller chunks.

  2. Make sure the UVs are good. Are they on the correct channel etc.

  3. Use dynamic lighting.