I used here is the Mesh Baker 3.24.1.
Download Link: https://pan.baidu.com/s/1UER6EKKEdIkUlSHBq6cvCw extraction code: pk6i
After the download is complete import mesh Baker project
view GameObject-> CreateOther-> MeshBaker-> Mesh And MaterialBaker. If you have this option describes the import was successful. If you do not need to re-import.
Let's do a test, look at the effect of
data before and after contrast to Baker. Apparent discrepancies optimized
additional resources will be used after the merge, and generates new resource baker
Specific operation procedures
selected GameObject-> CreateOther-> MeshBaker-> Mesh And MaterialBaker: 1
is created out after selecting a TextureBaker (0) Object
2: Baker all objects to be selected. Then select Add Selected Meshes toTarget objects added to Object to be Combined in
3: Create a resource to export
4: Select baker Materials. The material will need to be merged into a single 
5: The final choice meshBaker, you can generate the required content.
