I am making a corn plant/crop that is two blocks high. I want the plant to use different textures depending on if it the the lower or upper half of the plant and depending on the age that half is. That is why I have made two different type of states: "age" & "half. "age" can be a value from 0-7 and "half" can be "upper" or "lower". The problem is that I can't get my blockstate file to work. Can someone explain me how I should do this, because the forge documentation only explains how to select a model with one state/variable. Here are some of the things I've tried.

 

{
  "forge_marker": 1,
  "variants": {
    "age=0, half=lower": { "model" : "boneappletea:corn_lower_stage0" },
    "age=1, half=lower": { "model" : "boneappletea:corn_lower_stage0" },
    "age=2, half=lower": { "model" : "boneappletea:corn_lower_stage1" },
    "age=3, half=lower": { "model" : "boneappletea:corn_lower_stage1" },
    "age=4, half=lower": { "model" : "boneappletea:corn_lower_stage2" },
    "age=5, half=lower": { "model" : "boneappletea:corn_lower_stage2" },
    "age=6, half=lower": { "model" : "boneappletea:corn_lower_stage3" },
    "age=7, half=lower": { "model" : "boneappletea:corn_lower_stage3" },
    "age=0, half=upper": { "model" : "boneappletea:corn_upper_stage0" },
    "age=1, half=upper": { "model" : "boneappletea:corn_upper_stage0" },
    "age=2, half=upper": { "model" : "boneappletea:corn_upper_stage1" },
    "age=3, half=upper": { "model" : "boneappletea:corn_upper_stage1" },
    "age=4, half=upper": { "model" : "boneappletea:corn_upper_stage2" },
    "age=5, half=upper": { "model" : "boneappletea:corn_upper_stage2" },
    "age=6, half=upper": { "model" : "boneappletea:corn_upper_stage3" },
    "age=7, half=upper": { "model" : "boneappletea:corn_upper_stage3" }
  }
}

{
  "forge_marker": 1,
  "variants": {
    "half=lower": {
        "age=0": { "model" : "boneappletea:corn_lower_stage0" },
        "age=1": { "model" : "boneappletea:corn_lower_stage0" },
        "age=2": { "model" : "boneappletea:corn_lower_stage1" },
        "age=3": { "model" : "boneappletea:corn_lower_stage1" },
        "age=4": { "model" : "boneappletea:corn_lower_stage2" },
        "age=5": { "model" : "boneappletea:corn_lower_stage2" },
        "age=6": { "model" : "boneappletea:corn_lower_stage3" },
        "age=7": { "model" : "boneappletea:corn_lower_stage3" }
    },
    "half=upper": {
      "age=0": { "model" : "boneappletea:corn_upper_stage0" },
      "age=1": { "model" : "boneappletea:corn_upper_stage0" },
      "age=2": { "model" : "boneappletea:corn_upper_stage1" },
      "age=3": { "model" : "boneappletea:corn_upper_stage1" },
      "age=4": { "model" : "boneappletea:corn_upper_stage2" },
      "age=5": { "model" : "boneappletea:corn_upper_stage2" },
      "age=6": { "model" : "boneappletea:corn_upper_stage3" },
      "age=7": { "model" : "boneappletea:corn_upper_stage3" }
    },
    "age=0": {
      "half=lower": { "model" : "boneappletea:corn_lower_stage0" },
      "half=upper": { "model" : "boneappletea:corn_upper_stage0" }
    },
    "age=1": {
      "half=lower": { "model" : "boneappletea:corn_lower_stage0" },
      "half=upper": { "model" : "boneappletea:corn_upper_stage0" }
    },
    "age=2": {
      "half=lower": { "model" : "boneappletea:corn_lower_stage1" },
      "half=upper": { "model" : "boneappletea:corn_upper_stage1" }
    },
    "age=3": {
      "half=lower": { "model" : "boneappletea:corn_lower_stage1" },
      "half=upper": { "model" : "boneappletea:corn_upper_stage1" }
    },
    "age=4": {
      "half=lower": { "model" : "boneappletea:corn_lower_stage2" },
      "half=upper": { "model" : "boneappletea:corn_upper_stage2" }
    },
    "age=5": {
      "half=lower": { "model" : "boneappletea:corn_lower_stage2" },
      "half=upper": { "model" : "boneappletea:corn_upper_stage2" }
    },
    "age=6": {
      "half=lower": { "model" : "boneappletea:corn_lower_stage3" },
      "half=upper": { "model" : "boneappletea:corn_upper_stage3" }
    },
    "age=7": {
      "half=lower": { "model" : "boneappletea:corn_lower_stage3" },
      "half=upper": { "model" : "boneappletea:corn_upper_stage3" }
    }
  }
}

 

Removing the spaces from the first file worked. Thank you.