shadow bake problem

Unity Engine
1

i have a shadow bake problem, can anybody help me?

after i baked model with shadow ,shadow disappear,why?

1 before baking shadow

1653147--103218--1.png
1653147--103218--1.png1042×563 59.4 KB

2 after baking shadow

1653147--103219--2.png
1653147--103219--2.png1039×537 55.4 KB

3 here are some settings

1653147--103220--3.png
1653147--103220--3.png331×701 29.7 KB

1653147--103222--4.png
1653147--103222--4.png385×723 35 KB

2

You have to mark the plane as Static in the top-right.

3

thank you for your reply

i use terrain, and after set terrain static, began to bake, unity throws an error " Lightmapper needs both normals and tangents in Directional Lightmaps mode"

what i mainly want to do is make a single model with its shadow, then package it into unity resource file whitch i can use derectly in other sence