It would look nice to see this map with aurora borealis, so I made a custom sprite texture pack that contains seven textures and some basic information on how to make the final effect. I also included the proper directory location for the .vtf and .vmt. files.
Give me an email if anyone is interested in downloading and I will answer any questions, including how to pack the material files in the .bsp.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1852331079
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1852332237