Using anything but a BEWLR model in separate transforms displays nothing

[thomasglasser]

Minecraft Version: 1.21.3

NeoForge Version: 21.3.10-beta

Steps to Reproduce:

1. Load up an example mod with a resource pack containing this file in place of trident.json: (Sample resource pack)

{
  "base": {
    "parent": "minecraft:builtin/entity"
  },
  "gui_light": "front",
  "loader": "neoforge:separate_transforms",
  "perspectives": {
    "fixed": {
      "parent": "minecraft:item/generated",
      "textures": {
        "layer0": "minecraft:item/trident"
      }
    },
    "ground": {
      "parent": "minecraft:item/generated",
      "textures": {
        "layer0": "minecraft:item/trident"
      }
    },
    "gui": {
      "parent": "minecraft:item/generated",
      "textures": {
        "layer0": "minecraft:item/trident"
      }
    }
  }
}

2. Load up the game and get a trident
3. See it only displays in the hand, not in a GUI or on the ground

Description of issue:
Any model other than a BEWLR parent passed into a separate transforms loader now shows nothing.

[neoforged-releases]

🚀 This issue has been resolved in NeoForge version 21.3.13-beta, as part of #1671.