Hi there,
I wanted to update some older Insurgency maps, but I've noticed that every map with env_cubemaps enabled in the visgroups, Hammer crashes during compile at: fixing up env_cubemap materials on brush sides. When the cubemaps are disabled in the visgroup, it just compiles fine.
Pretty annoying and the same happends when I try it with NWI their stock maps aswell. Nothing works, so I'm a little out of options to solve this issue.