I've been hit with a roadblock for months that I haven't been able to get any help with, I want to make a mod that includes a custom grass/dirt block varient, "grassy mud" essentially, how do I go about correctly copying the data of the grass block for it to not just freak out? even if i use the vanilla json for the grass block, it just has no idea what to do with the grass overlay, I want it to use the biome colors the same way the grass blocks do, but no matter how I edit the json, it refuses to work. I also want it to have the same behavior as the grass block, where when a block is placed on top, it turns into mud instead of dirt.
Is there something specific I need to do to implement this? I've just been using "Modding by Kaupenjoe's" tutorial series and all other block types work, I'm just stuck on grass.