How to Blend Multiple Projectors for Seamless Coverage

Blending multiple projectors lets you cover surfaces too wide or tall for a single projector, like a full building facade or a long stage backdrop. Map Club splits one canvas across up to four projectors and blends the overlap for you, so you design once and the seams disappear.

Why Blend Projectors?

• Coverage: Map surfaces larger than a single projector can handle
• Resolution: Each projector adds its own pixels to the image
• Brightness: Shorter throws per projector keep the image bright
• Flexibility: Place projectors where the venue allows

The Blending Process

1. Position the projectors: Point them at the surface so neighbouring images overlap by roughly 10 to 20 percent. Side by side works for wide surfaces, stacked for tall ones.

2. Size the canvas: Each projector shows an equal share of the canvas, so set the canvas size to their combined resolution. Two 1920 × 1080 projectors side by side with a 192 px overlap need a 3648 × 1080 canvas (1920 + 1920 − 192).

3. Set up projectors in Map Club: Hover the output window button in the top bar, set Projectors to the number you're using, choose Side by side or Stacked, and enter the overlap in pixels. Dashed outlines in the output panel show what each projector covers.

Try the projector settings yourself. Hover the monitor icon, set Projectors to 2, and watch the dashed outlines appear in the output panel:

4. Open a window per projector: Save your project, then click Open projector 1, Open projector 2, and so on. Drag each window to its projector's screen and double-click it to go fullscreen.

5. Line up the overlap: Adjust the overlap value and the projectors' physical position until the shared area matches on the surface. Map Club fades each projector out across the overlap, so the two images add up to even brightness instead of a bright band.

6. Map your surfaces: Build your surfaces across the whole canvas as usual. Trace guides over the lit building to place them precisely, even where they cross from one projector to the next.

Tips for Success

• Use identical projectors when possible for consistent color and brightness
• Calibrate projectors to the same color temperature
• Keep every projector at the same aspect ratio as its share of the canvas to avoid black bars
• Only projector 1 plays sound, so connect your speakers to the computer running it

See using multiple projectors in the docs for every setting.