"Things like that become a blur - shot at some soundstage, somewhere - that's as much as I can remember"

This quote by Rob Zombie is likely describing the experience of filming a film. The process of recording can be a blur, with days invested in a soundstage, shooting scenes and discussion. It can be tough to keep in mind the details of every day, as the days can blend together. The quote recommends that the speaker can just remember the basic experience of shooting, and not the specifics. This might be due to the reality that the speaker was on a soundstage, which is a regulated environment, and the days may have been comparable in regards to the activities that took place. The quote also recommends that the speaker might have been overwhelmed by the experience, and the information may have been lost in the blur of the experience.