The usual advice for dreamy photos is to use shallow depth of field and a pricey diffusion filter, and both tend to leave you with images that look soft without feeling like anything. The look that reads as a memory comes from light, motion, framing, and focus working together, and most of it costs nothing. Max Kent spent years trying to recreate the feeling he found in a few frames from a morning commute, and he starts with light. Blue hour, just before sunrise or just after sunset, gives you soft light along with color and tones you won't see at any other time of day. An early start also…