Quickiemod_1.21.3/src/main/resources/assets/quickiemod/models/block/blockstackerup.json

{
	"parent": "block/cube_bottom_top",
	"textures": {
		"bottom": "quickiemod:block/blockstackerin",
		"side": "quickiemod:block/blockstackerup",
		"top": "quickiemod:block/blockstackerout"
	}
}