Obscures level, zone, map, etc. loading. Commonly done in locations where player does not see where they came from nor where they're going to, so previous area is unloaded and next area is loaded. For example, during an elevator ride or airlock cycling.
The first video game about Obscured loading was released on November 13, 2007.
This is halfway solution of actual loadless game where instead of constantly loading and unloading areas in the background, it's limited to few locations but still without actual loading screen.
Usually can be noticed from sudden performance degradation during these scenes, or their unusually long or variable durations (especially between differently equipped computers).