27 June 2009 at 01:16 GMT
Harry Potter and the Half-Blood Prince production designer Stuart Craig is profiled in a new interview with the LA Times. In the interview, Craig talks about the use of CGI, designing sets for Professor Slughorn, the cave, and more.
JP: What substance did you actually use for the memories?
SC: It was a computer-generated, CG effect, as many of these things are. These movies have been done for nine years now. When we began, there was much more done physically — and it’s amazing when you look back on the progress of digital effects in the last nine years.
You can read the full interview by clicking here.