Computer rendering technology has come a long, long way. In ye olde days, architects and designers depended on hand drawing and colored pencils to communicate their ideas to clients, but now it's possible to create nearly photorealistic renderings of spaces that don't even exist yet. I know I've been surprised, while putting together roundups of beautiful rooms for Apartment Therapy, to discover that some of those spaces exist only inside a designer's imagination (and a computer file). So I've put together a little quiz. Can you spot which of these rooms are computer renderings — and which are the real thing?