Thanks. You are right, but I actually talked about pre-rendered, 3D (not 2D) and photo-realistic background. Pre-rendered 3D background wasn't a new thing even

Thanks. You are right, but I actually talked about pre-rendered, 3D (not 2D) and photo-realistic background. Pre-rendered 3D background wasn't a new thing even among adventure games (again, The 7th Guest had done that), but Myst was probably the first one --- at least among adventure games --- that really had photo-realistic pre-rendered 3D backgrounds.