Dot-matrix and retro LED displays in Unity

A dot-matrix display is all about the dots: every diode is visible, letters snap to the grid and the brightest dots bloom into their neighbors. Scaling pixel art up with point filtering gets the blocks but none of the hardware, with no round diodes, no dark gaps between them and no glow. LED Studio builds the display from emitters instead, so a ramen sign, a departure board or a pinball-style score display reads as real LED hardware from across the street and up close.

Start with a chunky grid

The Low Res preset in Tools > LED Studio > Board Wizard creates a 40 x 40 emitter board at P20, the classic blocky LED look. Pitch is the distance between emitters in millimeters, and the manual groups P10, P16 and P20 as chunky boards with an obvious diode pattern, suited to large outdoor signs, stylized retro displays and distant ribbons. Size follows from emitter count times pitch, so the Low Res board measures 0.8 m square.

The fewer the emitters, the more each content pixel becomes a visible dot. When a source is larger than the grid, a reduction mode decides how it is sampled, with Nearest, Box, Luma Priority, Edge Preserving Sharpen, Ordered Dither and Alpha Priority to choose from. Emitters are reconstructed in the LED Board shader rather than built from separate objects.

Text that snaps to the dots

The Internal text renderer draws built-in crisp 5 x 7 Western glyphs, the classic dot-matrix character size, with no font asset at all. For other typefaces, Font mode uses a TextMesh Pro font, and the examples ship LED TMP versions of pixel fonts such as Press Start 2P and Pixelify Sans. Set rasterization to Crisp so text pixels map to whole LEDs instead of half-lit antialiased edges; Smooth keeps the antialiasing and Auto picks the default for the font. Scrolling, seamless wrap and blinking in Flash or Fade mode work on the same sources, which covers marquee messages and flashing warnings.

Emitter shapes and close-ups

Each board picks an emitter shape: Circle for round diodes, Square for block pixels, Hexagon, or LCD RGB with red, green and blue subpixels in RGB or BGR order for screens the camera gets close to. Near the camera, optional close-up detail shows the diode lens. Far away, the board blends toward a smoother image to reduce aliasing and moire, so a coarse sign stays calm in a wide shot.

Letters O, X, H and L on four boards with different emitter shapes.

Asset Store slide: round, square, LCD RGB and hexagonal emitters side by side.

Glow, wear and the arcade look

Real LED signs are bright, so use HDR brightness and bloom in the camera or render pipeline; without bloom, dots look printed rather than lit. The brightness response, Linear, Gamma Biased or Venue Contrast, shapes how content maps to diode output. For a sign that has seen a few winters, keep Add Realistic Wear on in the wizard: it adds subtle dim LEDs, flicker and color drift, and the dead pixel and flicker guide goes further.

A macro shot from the arena film: warm round emitters, a few brighter than the rest.

Neon-themed and arcade scenes are a natural fit, and one Asset Store reviewer uses LED Studio in a neon-themed arcade game built with URP. LED Studio draws LED emitters, though, not glass tubes or marquee bulbs. For neon-style tubes, bulbs or solid 3D letters, use Text Studio 3D.

A pinball-style configuration

Classic pinball dot-matrix displays have 128 x 32 dots, which makes a good starting point. Try a Custom board with that emitter count, Circle emitters, amber text in the Internal font or a pixel font with Crisp rasterization, a dark presentation background and moderate bloom. Short score updates and blinking messages come from the same text sources, and a little wear makes the display feel like it has survived a few thousand games.

LED Display Basics explains pitch, emitters, brightness and bloom, and Content Sources covers text renderers, rasterization, scrolling and blinking.