First of all, the five keys you need, imagination, then sensibility, thinking, theme, and then direction, so the first image has to catch what you think is the material you need when you imagine. What kind of material you need depends on the surrounding situation, but it becomes a network of people who feel it with your skin and the surroundings to some extent, and you have learned in the past, and the situation also changes. I think, but at first, you need a material that reminds you of your imagination.