Texture Of The Water Light Effect

Im creating a map to do with the aquatic side of Black Mesa and I am having trouble finding the texture found in one of the Surface Tension levels it is within the new c2a5g but whenever I locate the map file it will give me the older version, I also checked the map_dir files and it doesnt seem to be there.

Just decompile the map:
https://www.therazzerapp.de/tools/bspsource.html

I already have as I said it is the older map in both the dir and mapsr

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.