[Question] How to apply tint to texture

[stalker57241]

Question I tried everything, but don't understand, how to apply change of tintindex in texture. I put it on overlay, the file become like this:

// It is gravel.json
{
    "loader": "fusion:model",
    "type": "connecting",
    "parent": "minecraft:block/block",
    "textures": {
        "particle": "#all",
        "all": "minecraft:block/gravel",
        "grass_overlay": "default_overlays:overlays/grass_overlay"
    },
    "connections": {
        "grass_overlay": [
            {
                "type": "match_block",
                "block": "minecraft:grass",
                "tintindex": 0
            }
        ]
    },
    "elements": [
        {
            "from": [0, 0, 0],
            "to": [16, 16, 16],
            "faces": {
                "down":  { "texture": "#all", "cullface": "down" },
                "up":   { "texture": "#all", "cullface": "up" },
                "north": { "texture": "#all", "cullface": "north" },
                "south": { "texture": "#all", "cullface": "south" },
                "west":  { "texture": "#all", "cullface": "west" },
                "east":  { "texture": "#all", "cullface": "east" }
            }
        },
        {   "from": [ 0, 16, 0 ],
            "to": [ 16, 16, 16 ],
            "faces": {
                "up": { "texture": "#grass_overlay", "cullface": "up", "tintindex": 0 } // yes, "tintindex": 0
            }
        }
    ],
    "credit": "Stalker57241"
}

grassoverlay.png grassoverlay.png

// grass_overlay.png.mcmeta
{
    "fusion": {
        "type": "connecting",
        "layout": "full",
        "render_type": "cutout"
    }
}

But it not changed form to look like full bitmap I used, and not got color of biome (It's primary problem. First mentioned problem I saw when closely looked at block).

[SuperMartijn642]

I tried everything, but don't understand, how to apply change of tintindex in texture

Wut, that is not something you can do. You can't just randomly put it in the connections 🤔

Block tinting is hardcoded per block. Fusion does not add anything for block tinting.