I don't remember if the map has cubemaps, but by default hammer compiles the map with cubemaps already baked in, which mostly don't show up. So there is a chance that they are not there, but try prescribing mat_specular 1 and also check your autoexec in case it prescribes mat_specular 0.

@Stakhowsky when I do random things everytime blackpurple comes around back in this map but nice map.

@Stakhowsky doesnt happen often