[Request] Add multi texture support for OptiFine CEM

[ewanhowell5195]

JEM models support different textures per bone, as well as the main texture that is applied to everything:

    "texture": "test_texture.png",
    "textureSize": [32, 32],
    "models": [
        {
            "part": "body",
            "id": "body",
            "texture": "test_texture1.png",
            "textureSize": [32, 64],
            "invertAxis": "xy",
            "translate": [0, -27, 0],
            "boxes": [
                {"coordinates": [-0.5, 0, -0.5, 1, 31, 1], "textureOffset": [0, 0]}
            ],
            "submodels": [
                {
                    "id": "bone",
                    "texture": "test_texture2.png",
                    "textureSize": [64, 32],
                    "invertAxis": "xy",
                    "translate": [0, 27, 0],
                    "boxes": [
                        {"coordinates": [-1.5, -2, -0.5, 3, 2, 1], "textureOffset": [4, 0]},
                        {"coordinates": [-2.5, -1, -0.5, 1, 4, 1], "textureOffset": [4, 3]},
                        {"coordinates": [1.5, -1, -0.5, 1, 4, 1], "textureOffset": [4, 3]}
                    ]
                }
            ]
        }
    ]
}

at the moment blockbench doesnt detect these textures when opening the model, and completely deletes the lines upon saving
it would be nice to see something in blockbench like this where u can apply textures to individual bones

[WantedRobot]

yes please add this

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[ewanhowell5195]

e

[aurora-1-2-3]

I don't anything Abt development
But
Just copy the multi texture code from the generic model to the optifine?
[this question is for jannis]