To fix this issue you need to select all with "I" key and drag it on the upper level.

Same problem. Any ideas?

So i dropped a bunch of path nodes but it does not helped. Here is the video.

Zombies just die without any reason. I got two zones: zone1 and start_zone. They can die in both of them and then just respawn again. I know  they should die when player is too far from them but some of them just dying right in front of me just to respawn again.

I need a sound of looping fire(torch), ambient wind wounds and music from radio(ambient as well). I got them converted. Just need to implement them.

So I want to add some sounds into my map. I found this user_aliases file and downloaded aliases editor. There is many blank fields, and I have no idea what to write there. Which fields require my attention actually? And what i need to write there to setup for example sounds of looping fire or looping song?

Same problem.  Any progress?

So, I am in process of scripting my map. Created 2 zones, scripted zombie spawns etc. And I noticed that some zombies just dying without any reason, and after this they will respawn again. I know, that game kills the zombies if they are too far from the player, but they are dying right in front of me. What is wrong?

I resolved it!
So for brushes you need to 1. Right click on it. 2.Choose Make Umbra Target.
For Models: Add KVP umbra_target_only to 1.

Thanks to Cornrow Wallace from mappersunited.com.

So, setting umbra_target_only 1 KVP helped for models. And make umbra target worked for brushes as well. BUT now I simply can't see outdoor area through the window, but can see it when I use noclip and go through window. Guess I need to wait till Treyarch will fix it. This is beta after all.

Well, yes. Anyway thank you. I will try to do smth with the skybox. Or will try to copy everything on the new map and create new skybox there. Last time it somehow helped. Hopefully we will find better solution in the future.

Some of them are caulked yes, But I wanted to caulk everything closer to the release of final and playable version of the map. Do you think this might be the issue?
If I remember correctly I had this issue when my map was just 1 room, I caulked it and it does not helped.

I was using zm_factory as well. But still I don't think this is specific skybox issue.

I think i have the same issue. So your brushes,models were randomly disappearing in-game?You created new map. file and that's all?  Will try that. But this issue is appearing third time on my map. So it will definitely appear again. Would like to know the reason of this.