The Shared Screen

Glass boards and see-through displays: writing on light

Glass display surfaces occupy a category of their own: they are simultaneously whiteboards, broadcast studios, and interactive canvases — and the choice between them shapes how a team works, teaches, and presents for years.

01

The family of glass display surfaces

Three distinct product types share the word "glass," but they serve different masters. Dry-erase glass walls are the most familiar: large panels of tempered glass, usually white or slightly frosted on the back surface, that accept dry-erase markers and mount flush to a wall or hang from a ceiling track. They function as a permanent, high-clarity replacement for the painted whiteboard.

Lightboards occupy a different category entirely. A lightboard is a panel of clear glass — typically optical-grade or borosilicate — lit along its edges so that light travels through the glass and illuminates anything written on the surface with neon or fluorescent markers. The presenter stands behind the glass and faces the camera. The result is a speaker who can annotate in real time without ever turning away from the audience.

Interactive glass systems add a third dimension: a transparent or lightly tinted panel with embedded touch or stylus sensing, connected to capture software that records annotations digitally. Some versions overlay a live video feed so the digital writing appears alongside the speaker on screen. These systems cost significantly more than a passive lightboard but produce an output that is immediately archivable, searchable, and reproducible.

How a lightboard studio works — writing that glows while the presenter faces the camera.
02

Why lightboards changed recorded teaching

The single most consequential upgrade in video-based instruction is eye contact. On a conventional whiteboard setup, an instructor faces the wall to write and faces the camera to speak — and every turn is a small break in presence. The lightboard eliminates that break entirely. The presenter writes on the glass surface while looking directly into the lens, and the audience sees both the speaker's face and the annotations simultaneously.

Production requirements are minimal but non-negotiable. The room must be dark, or nearly so, to allow the edge-lit glow to read clearly against the background. A single camera is positioned directly in front of the glass. Because the presenter writes from the back of the panel, the text appears reversed from the camera's perspective — so the output must be horizontally flipped in post-production or live-switched. Most broadcast software and video editing tools handle this with a single mirror toggle.

Marker choice matters more than most new lightboard users expect. Standard dry-erase markers produce a thin, low-luminosity line. Neon markers designed for glass — particularly in yellow, green, and orange — glow visibly under edge lighting at normal camera exposure settings. Writing with a dark background means the glow reads cleanly even in compressed video formats where fine detail is often lost.

From the planning library — the maintained source set behind this guide: https://sites.google.com/emeryeps.com/metroclick-authority-hub/interactive-video-wall/interactive-glass-display-system
03

The physical object: glass, hardware, and upkeep

Standard dry-erase glass panels use tempered safety glass, usually between six and twelve millimeters thick. Thicker panels resist flex and are less prone to stress fractures around mounting points. Edges are polished to remove sharp corners; an unpolished edge on a large panel is a genuine cut hazard in a busy room. Panels mount on standoffs — short stainless hardware that holds the glass a few centimeters off the wall, allowing the panel to flex slightly under writing pressure without cracking.

Glare is the practical difficulty in bright rooms. Glass panels reflect overhead fixtures and windows directly back at the room. Matte anti-glare coatings reduce reflection but also reduce the clarity that makes glass surfaces visually appealing; most installations are a compromise between surface clarity and ambient light control. Positioning the panel perpendicular to windows and shielding overhead lights with directional fixtures helps more than any coating choice alone.

Cleaning is straightforward but unforgiving. Glass shows every fingerprint, palm smear, and marker residue in ways that painted boards never do. The advantage is permanence: glass does not ghost. Dry-erase paint and porcelain-coated boards accumulate a shadow of old marks over years of use. Glass returns to a factory-clean state with a standard glass cleaner and a lint-free cloth, every time. Teams that write on glass every day typically keep a microfiber cloth at the panel and wipe it at the close of each session as a routine.

04

Choosing the right surface for your situation

The core question is who the audience is and where they sit. A dry-erase glass wall serves people in the room. It is a collaboration surface, a persistent display, and a visual anchor for a meeting. It does not naturally produce a recording, does not integrate with software, and offers nothing special to remote participants watching a screen share. For teams whose primary work mode is in-person ideation, it is often the right and most durable choice.

A lightboard studio is purpose-built for camera-facing delivery. Its audience is never in the room — they are watching a recording or a live stream. The format rewards instructors, trainers, and presenters who deliver the same material repeatedly to different audiences. The investment is in the production setup as much as in the glass itself: lighting, camera position, backdrop, and post-production workflow are all part of the system. Teams that produce training content on a regular schedule will recover the setup cost in reduced re-shoots and improved viewer retention.

Interactive glass systems are the right choice when the output needs to be both a live collaboration surface and a digital artifact. They suit hybrid teams where some participants are in the room and others are remote, and where the annotations made during a session need to be captured, exported, or reviewed later. The maintenance burden is higher — touch sensors require calibration, software requires updates, and the integration between the physical surface and the capture system introduces failure points that a passive glass wall simply does not have. That complexity is worth accepting when the use case genuinely requires it; it is not worth accepting when a lightboard and a simple recording setup would serve just as well.