I sit in my office and conjure up all sorts of crazy and unique ideas for my projects: apocalyptic scenarios and serial killers. Anything can trigger these insights: a conversation, a news article, an interaction with nature, something that pops up in my meditation, or just some warped thought.
My imagination is a real strength of mine, and I believe all artists have an incredibly potent imagination muscle.
Source: https://nofilmschool.com/imagination-double-edged-sword