lightmap in assetbundle became dark

hello everybody, I've load lightmap serveral months ago，which is refering to: https://forum.unity.com/threads/problems-with-instantiating-baked-prefabs.324514/

and my new problem is that the light is quite dark than the orginal.
this is original:


this is loaded :



by the way, I found the value of m_Lightmaps2 is always to be empty,so I changed the line 73 to
"
newLightmapData.lightmapDir = lightmaps;
"
otherwise, the scene will be like this:




I don't know what's wrong with it,any help will be appreciated.

 

Submit a bug report?

 

there is not any bug shows

 

I found it relate to LightingData.
When I load the scene from assetbundle, Lighting Data Asset is null


even I have right lightmap index,color and dir,lightmap is still wrong.

When I drag the LightingData manually to "Lighting Data Asset", light shows correctly.

While the question is When I build it into assetbundle, the Lightingdata could only be access from editor,how could I fix everything to run normally?

 

"Lighting Data Asset" is null




not null:

 

So, did anyone find a solution?

 

Same Problem Happend! in Unity 2017.3 How to deal with it?

 

Looks similar to what we see in Unity 2018.3.0f2 with the Addressable Assets.

Did anyone find a solution or workaround