Problems with Decals/Materials

I'm currently rebuilding a map (yes, I got the original author's permission), and I keep having issues with decals.

I recreated the issue as follows:

I want to remove the road lines using a pavement texture, as a means of (intentionally) making the process look half-baked.

I create a new decal template...

I then use the material browser to find what I'm looking for. As you can see, the material is showing up just fine.

I then slap that over the painted line...

...and add a copy of it as well. I renamed the decal to "example", and click "Save All" under the decal menu.

I am then prompted to save the map when I select quit. Having removed the player vehicle and wanting to keep these changes, I click yes.
Having exited the game, I proceed to load it back up, enter the map, and...


...this happens.


I've done some digging,and found out that while the material.cs file is incomplete, this does not explain why it shows up until I reload. I really, really do not want to write a material.cs file from scratch (I don't have the patience or the attention span), and I honestly am not sure if there is any other issues. I also should point out that this texture file came up without any additional files needed, so I'm not even sure a material.cs file is going to fix the problem. I've gone through the forums and, as far as I can tell, no one has had complaints about this issue when it comes to decals. (I did come across a post that involved missing textures on prefabs, but I'm unable to tell if that even applies here, and the solution in that case involved a lot of material.cs writing...which again, I don't feel like I'm capable of handling.)

Please let me know what I'm doing wrong, and if there are any alternative solutions to writing a material.cs from scratch.

 

yep
this is one of the leading reasons i am not releasing my new map

 

How long has this been an issue for you?

 

Since the latest update (.16)