Resource Customization - MUYUTwilighter/Croparia GitHub Wiki
The resource (textures, models) customization is provided by Minecraft, and surely you can edit resources in a vanilla way.
If you are not familiar with resource pack development, you should check Minecraft Wiki first. Here we are more focused on "where to" things, rather than data pack itself.
In this category, you can get solutions for following things:
By browing game directories, you might find resource files in .../<GameDir>/config/croparia/assets/...
.
This is where Croparia IF automize the resource insertion, and you are NOT SUGGESTED to modify any data inside.
Because Croparia IF will try to override all these files by default, which means any changes you've made here might be lost.
However, it is pretty fine if you just want to see the definition of the data files (i.e. you are in "read-only" mode).