there are quite a number of white-ghost items in the RIG. White ghost is when the item is visible only if you put some other color behind the item, like a background--it's invisible in the standard forum white. I'm going to put the otherwise useful items from the RIG first, then all the white-ghosters.
Apotropic Magic (Evil Eye, Hand of Fatima, Angel Banishment, and Shimenawa) show from behind only: both sides on Hard Shell Pack and Dander/Coffin/Jack.
Chain Letter (You Got Mail!) partial behind, both sides on HSP, full front on Dander/Coffin/Jack.
Demonic Chair, both poses both sides for everyone.
Possessive Captain white ghost from behind; full front on Humanoids; white ghost both sides on HSP; wg front, full back on Dander/Coffin/Jack.
Project Fatal (Searching Hands) white ghost behind, both sides HSP, full front wg back Dander/Coffin/Jack; (Camera Frame) partial front, full behind; both sides full on HSP and Dander/Coffin/Jack.
Third Stall (It's Safe and She's Here) behind only on Emgnol/Wisp
And all of the following have the same properties, to wit: white ghost from bahind; both sides on HSP and D/C/J
Forbidden Hook (Honey Chest)
Huin Seulpeum title pose
Melodious Witchcraft title pose
Rusalki Maiden (Dress)
The White Lady (Veil, Draped Waist, Torn Sleeves)
Wedding de Mortis title pose
also, for more limited use:
Pet Cemetary (Undead Cat) white ghost front only HSP and D/C/J; (Undead Rabbit) front only Dander/Coffin/Jack only
Weeping Wanderer (Shawl) front only HSP and D/C/J.