You can craft a Perception Filter to make yourself partially invisible.
Type the command
/tardisrecipe filter in game to view the crafting recipe.
Once crafted you can equip the Perception Filter in your chest armour slot by right-clicking air with the filter in hand.
To disable the filter just remove it from the chest armour slot.
Note: When travelling between worlds, the Perception Filter may go completely invisible — if this happens, just press your “sneak” key (usually LEFT-SHIFT) to make the player skin update.
Note 2: The Artron Energy readout will not display if you are wearing the Perception Filter.