Josh McDermott continues MIT's course on perception (9.35) with a lecture on how the visual system builds color and motion experience from raw sensory input. He picks up the color perception discussion, examining how the brain uses signals from the eye's cone cells to infer stable surface colors despite changing lighting conditions, then moves into motion perception, covering how the visual system detects and interprets movement in the world. Running 78 minutes, the lecture is part of MIT OpenCourseWare's Spring 2024 offering and assumes familiarity with earlier sessions on basic visual processing. McDermott works through the computational problems the brain must solve to turn ambiguous retinal input into reliable perceptual judgments, grounding the discussion in specific examples of how color constancy and motion detection function under real-world conditions.