Adventure Treff, in usual awesome fasion, have decided to provide a video series of footage from Games Convention 2007 (remember that?!). In Part Four there's an interview with Bill Tiller around the 9:00 minute mark, as well as some brief, awkward stalking of Tim Schafer near the beginning. In the interview (which is in English) Bill Tiller elaborates a bit on the "idea icon" that was borrowed from Brian Moriarty's version of The Dig and employed in A Vampyre Story. He says other things too, so check out the whole video.
Thanks to basti007 from the Adventure Gamers forums for the tipoff.
Source: Adventure-Treff