This is just one of the many quirks you'll see in MGS: Peace Walker. Can't believe this game is a PSP title with all the great content it packs.
This particular footage was recorded using Fraps through a PSP emulator. I also have the HD remaster of the game for the PS3, and I can say the upscaled graphics here are almost identical to it -- only the framerate is preserved at native PSP performance (20 fps, in this case). The emulator itself is fantastic; it runs games at full speed with minor bugs and offers a multitude of shader effects. The emulator is called PPSSPP, in case you're wondering, and it's also on Android. But I think the Windows version is the more stable version.
