Multiple traits from folder structure in a single layer?

[andymelichar]

Suppose I have the following folder/file structure for a layer:

Pattern
    Pattern1#50
        Color1#50.png
        Color2#50.png
    Pattern2#50
        Color1#50.png
        Color2#50.png

I want to be able to assign two traits for this layer:

{
      "trait_type": "Pattern",
      "value": "Pattern1"
},
{
      "trait_type": "Color",
      "value": "Color2"
}

I've tried different folder structures and turning on/off useRootTraitType, but I can't figure out how to get this kind of output - all I get is this:

{
      "trait_type": "Pattern1",
      "value": "Color2"
}

Is it even possible to derive multiple traits from the folder structure like this?