Sometimes, when trying to enter a room with many details/models, the screen would fade to black normally, but after a while the OS will freeze with the game, and resuming (like refreshing a page in a web browser but the entire OS) with the game still frozen.

The same thing happens when resizing the game window.

Running the game with Windows 7 compatibility mode resulted the same with the difference being the game window being white instead of the last frame before freezing. Running with Windows 8 compatibility mode, however, resulted in a big impact of OS UI (taskbar, wallpaper, icons) being black before returning normal after a while, while leaving Steam broken without restarting.

Making the game have more lag (currently running with 30 fps), by having more detailed shadow or higher resolution, solves this problem.

Here's the log: