This is custom head block.
You can get base64 texture value from or from
material: customhead:ewogICJ0aW1lc3RhbXAiIDogMTY1NDEzNTEyMjkwOSwKICAicHJvZmlsZUlkIiA6ICI5ZGY3MmQyMTIzZDc0MWRiOWZmNGFlYzljZWIxNTRlNiIsCiAgInByb2ZpbGVOYW1lIiA6ICJLcnluaW8iLAogICJzaWduYXR1cmVSZXF1aXJlZCIgOiB0cnVlLAogICJ0ZXh0dXJlcyIgOiB7CiAgICAiU0tJTiIgOiB7CiAgICAgICJ1cmwiIDogImh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvMjQxMGMwZjI4ZDBjOTFkMGZlODFjZmUzZjZlMjMwYmFhN2YxOTY5NTlhOGI4NDBkN2U2ZDdlMDNjNjYzNDBkNSIKICAgIH0KICB9Cn0=
