Baked lightmap produces strange "stains" on objects

Hi everyone,
I’m getting black spots and lines on my static objects when I bake my scene. Here’s an example to show what I mean. I’m using Unity 5.6.1f1.

Tree after baking:

Cliff after baking:

Tree before baking:


Cliff before baking:

Any ideas as to what I’m doing wrong?

Edit 1: Screenshots added. The problem was solved after following the instructions in this thread and checking the “Generated Lightmap UV” check box and re-importing my models and then re-baking.

Lighting:

Light inspector:

Quality:

Graphics:

Hello. Will be much easier to find reason for this behavior if you attach screenshots of

  • inspector of your light
  • lighting settings tab
  • quality settings
  • graphics settings