There's a specific polygon on the south side of the Island Sanctuary with a misbehaving texture. Up close the texture works as intended but when you get further away the texture disappears and the polygon becomes transparent. Its visible from any angle but its easier to see it from further east and higher in elevation because of the contrast with the water you can see through it.
The affected area is viewable from x22.6, y29.7, z1.0 looking west and downward.
Date & Time: Anytime
Frequency: At certain distances from the affected polygon
World name: Jenova
Character name: Cynehild Westknight
Steps:
1. Fly around
2. View the affected polygon