Minecraft wiki entry for Missing_textures_and_models, associated text: This effect can be seen without the use of resource packs up to 17w46a simply by holding ice, stained glass, stained glass panes or slime blocks of an invalid data value. For versions 17w47a up to 19w38b a resource pack is required to break the model of an existing translucent item, and from 19w39a the bug is no longer present at all.