Null Reference Exception in TerrainHelper.cs and others

[Dr.ake]

Guys,

since today I am getting a lot of these errors:

What to do?

[Peter]

@Dr.ake I looked into these errors, and they seem to be caused by a terrain that has no terrain data associated to it. Could you please check if all terrain objects in your scene have a terrain data object assigned? You can do so by switching the inspector to "Debug" mode, selecting the terrain and then checking if a terrain data object is in these slots:



If the terrain was created by Gaia, the terrain data object is created in the Session Folder in Gaia User Data by default.

[Dr.ake]

Peter, good effort in finding this out. This is in fact the problem:

I did find the folder with the terrains, but which of the 10 files is the right one to use as terrain data?

[Peter]

By default the terrain data file has the same name as the terrain itself - it looks like you do not have that terrain data object anymore, there is only a splatmap file (blue icon) with that name. The files in that directory look a bit odd, normally the splatmap should be a child of the terrain data object and named differently, like so:



It looks like the data in your folder got corrupted somehow - according to the timestamps in the filenames a lot of terrains were created within that session, did anything out of the ordinary happen during terrain creation (e.g. unity crashed)?

[Dr.ake]

Since I run into the "Waiting for unityeditor.coremodule.dll forever " error a lot I have to kill unity a lot. I was hoping that it reverts to the last saved condition after beeing killed. Any thoughs on how to protect against corruption after killing unity?

[Peter]

Changes on terrains, e.g. changing the texturing are permanent and detached from saving the scene file. As soon as you are looking into creating a larger project over multiple days, a source control system (git, plastic scm, etc.) is pretty much a must - they allow you to return to an earlier state of your terrains if there is any sort of issue.