I've looked over the description twice and I have no idea what makes this flashlight any different from Half-Life 2 and Garry's Mod's projected texture flashlight. It already casts dynamic shadows without any flashlight addons installed, even in first person, although that may be difficult to notice due to the objects casting shadows often getting in the way of seeing them. The provided screenshots don't seem to look any different to how the normal flashlight looks, at least not in any noticeable way, either.