Maass identifies three emotional channels a scene can run through. Inner mode is the character's relationship with themselves — self-doubt, pride, shame, private longing. Outer mode is the character's relationship with the physical world — awe at a landscape, claustrophobia in a room, sensory overwhelm. Other mode is the character's relationship with other people — empathy, jealousy, protectiveness, distrust. Most writers default to one mode. Literary writers lean inner. Thriller writers lean outer. Romance writers lean other. But the richest scenes shift between all three, because that's how real consciousness works — you're simultaneously aware of yourself, the room, and the person across from you, and all three are generating feeling.
Check Your Script
Tag each paragraph in a key scene: is it inner, outer, or other? If you find long stretches in one mode without shifting, the scene is running on one cylinder. Try inserting a beat from a different mode — a flash of self-awareness in an action scene, a sensory detail in a dialogue scene.