Mural is a model that allows a texture to stretch across multiple blocks.
Mural also requires width * height textures, texture texture has a key of the postion index ie, 1 is the top left.
{
"variants": {
"": {
"model": "minecraft:block/air"
}
},
"athena:loader": "athena:giant",
"ctm_textures": {
"1": "chipped:block/amethyst_block/ctm/massive_amethyst_block_bricks/0",
"2": "chipped:block/amethyst_block/ctm/massive_amethyst_block_bricks/1",
"3": "chipped:block/amethyst_block/ctm/massive_amethyst_block_bricks/2",
"4": "chipped:block/amethyst_block/ctm/massive_amethyst_block_bricks/3",
"particle": "chipped:block/amethyst_block/massive_amethyst_block_bricks"
},
"height": 2,
"width": 2
}