Time: Any
Frequency: Always
World name: Gilgamesh
Character name: Aresaka Kunokai
Class/Level: Lvl 60 BLM
Party or solo: Either
In-game time: Any
Steps:
1. Equip "Arachne Culottes of Casting"
2. Equip "Antiqued Goetia Thighboots"

Result: Equipping the two items together causes part of the character model to not render. The Goetia Boots cut off just below the top of the Arachne leggings and as such, where the leggings would be visible, a gap is formed where part of the character model doesn't render. Only the two items are necessary for this bug to occur and the Healing Culottes provide the same effect. I have not noticed it with any other thighboots as of yet.