Time: -
Frequency: always
World name: Tonberry
Character name: Seille Lorraine
NPC name: -
Monster name: -
Class/Level: -
Party or solo: -
In-game time: when dusk, 6 PM as on my screenshot
Area and coordinates: Verdant Drop (fishing spot) 20, 21 (on the bridge), East Shroud

Steps:
1. Stand on the bridge when dusk,
2. Zoom out and stay around 45-degree viewing angle for a few seconds, the sun color will change to reddish.
3. Move the camera to Bird's eye view, the sun color will change to normal.
4. Back to step 2 then zoom in, the sun color also become normal.
5. From step 2 while the color is reddish, rotate camera to south, look at the sky. Gradually the reddish sky will become cloudy and dark.

PC Specs
Intel core i5 2500
Sapphire Radeon HD6950 (Catalyst 13.4)

Screenshots