Oh shoot, looks like I missed something? When I got the pack ready for steampipe I removed several things I knew would conflict. That warning is really only about pure servers, you actually shouldn't see any difference visually. Most of the material edits I did were ones that do not affect the appearance in-game. That is one of the few that required a significant change so that it would show up nice in Hammer, and it seems I forgot about it.
My main computer with all the resources and stuff for assembling my pack installer won't be back up and running for about another week, so I can't get out a pack update until then. I'll try to remember to do that as soon as possible. I'm surprised nobody has mentioned this sooner, it seems obnoxiously obvious
edit: oh and to clarify this is a local issue just for people who have my pack. it isn't in your map nor will regular people see it.