At any place, where item is about to be configured there are two options possible to achieve that. Simple configuration saves space and is perfect, where you only want to set item material. Extended configuration on the other hand gives you the opportunity to freely customise ItemStack.
Simple configuration saves space and is perfect, where you only want to set item material.
...:item:STONE
Extended configuration on the other hand gives you the opportunity to freely customise ItemStack.
...:item: material: customhead:ewogICJ0aW1lc3RhbXAiIDogMTY1NDEzNTEyMjkwOSwKICAicHJvZmlsZUlkIiA6ICI5ZGY3MmQyMTIzZDc0MWRiOWZmNGFlYzljZWIxNTRlNiIsCiAgInByb2ZpbGVOYW1lIiA6ICJLcnluaW8iLAogICJzaWduYXR1cmVSZXF1aXJlZCIgOiB0cnVlLAogICJ0ZXh0dXJlcyIgOiB7CiAgICAiU0tJTiIgOiB7CiAgICAgICJ1cmwiIDogImh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvMjQxMGMwZjI4ZDBjOTFkMGZlODFjZmUzZjZlMjMwYmFhN2YxOTY5NTlhOGI4NDBkN2U2ZDdlMDNjNjYzNDBkNSIKICAgIH0KICB9Cn0=
name:"Head"lore: - "&cThats just player head"
Extended configuration examples
example_generator:#... other configurationgenerator-item:material:GRASSname:'&aExample generator'#and so on...
example_generator:#...generates:#... - type:itemchance:10.0item:material:STONE#only this is requiredamount:5name:"Magic stone"#and so on...
example_generator:#...generates:#... - type:blockchance:10.0material:STONEcustom-drops:#...item:material:DIAMONDname:"&bDiamond"#and so on...
example_generator:#...ingredients:#...A:material:STONEname:"Magic stone"#and so on...