MOOOOO!

There is another option by doing it with a very old mod and using this original file (or if you have to download it do it this way, but that may slightly lower quality of the props).

If so, and it looks like you did, you need to simply get these props into your local assets folder first - only if you have downloaded many assets to play the cities, if not then you just make sure you have them downloaded - (can be done as a seperate subfolder to group them together if you have to many folders there). Do the same with mods to put your props quicker (but remember to remove these mods from the local folder when finished creating the asset, if you had to use your local assets folder - i can guide you on that too).
Then create a new assets in the assets editor, choose one of the fields that has got the name Farming 2x2 - you will be able to remove props from that one and change its size to 4x4, but at least it will be done as an extractor type - I'm not sure what you have chosen here originally.

Did you create your model by simply using a template from the assets editor and plopping some props?

@macluk I don't know how aha. I had a look and tried to figure it out, but I have no idea how to do it.

Hi...
Do you know that this cow field is not extractor, you categorised that as a processor. Was it intentional?
If not would you be able to update it? It needs to have level 2, extractor or simply choose a vanilla building that extract raw materials.