Also I found out this:
In /plugins/ItemsAdder/assets/minecraft/textures/item, there is paper.png file missing.
In /plugins/ItemsAdder/assets/minecraft/models/item -> paper.json, in its config it says:
{
"parent": "item/generated",
"textures": {
"layer0": "item/paper"
},
"overrides": [
{"predicate": {"custom_model_data":2000001}, "model": "custom/elitecreatures/game_center/arcade_station"},
{"predicate": {"custom_model_data":2000002}, "model": "custom/elitecreatures/game_center/gashapon_station"}
]
}
Doesnt the "override" mean its overriding the default vanilla texture?