Efficient way to write additional data in TEXTCOORD

Hello!
We need to write some additioal data in UVs on static geomatry( 2 float3 values).
I would like to know if there is a way to write data values to static geometry during the build like Unity does for Lightmap UVs?

 

https://docs.unity3d.com/ScriptReference/Mesh.html

the mesh class exposes all of the additional uv sets, including some that unity's shaders don't already use, so that you can set them to whatever you want. Also the Vertex colors, which Unity's built-in shaders don't use either.

 

Thanks! There is no size overhead if we generate arrays offline?

 

Not sure what you mean by that, but it's possible to write code that runs only in the editor and outputs the modified mesh assets to file. That way, your code does not even need to run during your game's execution.

 

Nevermind! I did a test. Arrays greatly increase the size of scenes in a project. But the size of the build almost did not increase. I thought it would be a problem.
Thanks.