Darkroom treats the player like a film lab bench. The seek bar is a strip of 35mm stock: sprocket holes run along both edges, chapters are the gaps between spliced reels, played footage turns safelight red, and the playhead is a splice marker with a red notch. Above the strip, amber edge print shows a working footage counter (feet + frames at 24 fps), the way an editing bench reads it. A small red safelight beside the title glows while the film runs. Menus are cream contact-sheet labels, and the current choice is ringed in red grease pencil. Tooltips look like torn masking tape, and the settings icon is a six-blade aperture. All icons are hand-drawn for the skin.