The Windows tab is used to configure the output windows and assign projectors to each portion of the display grid.
Each window represents a physical or virtual output surface and defines how multiple projectors are arranged within it.
Windows
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Purpose: Defines the dimensions, layout, and position of each output window.
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Controls:
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+ / – – Add or remove windows.
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Edit – Open the Add/Edit Window panel.
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Name – Assign a descriptive name for the window.
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Width / Height – Set the window resolution in pixels (e.g., 1920 × 1080).
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Rows / Cols – Define how many projectors are arranged withing the window.
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These values determine how the image is subdivided.
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For example, a 2×2 grid splits the window into 4 equal quadrants, each driving a separate projector.
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This is especially useful when using hardware video scalers such as the Datapath Fx4 or D8, which take a single high-resolution input (e.g., 3840×2160) and divide it into multiple outputs.
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Window Position (X / Y) – Sets the position of the window on the desktop.
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Show Window – Displays or hides the window
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Projector Assignment
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Assign projectors to each grid region (Row/Column) using the dropdown selectors.
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For example, in a 2×2 setup:
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Row 0, Col 0 → Projector 1
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Row 0, Col 1 → Projector 2
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Row 1, Col 0 → Projector 3
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Row 1, Col 1 → Projector 4
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This mapping defines how projector outputs are tiled within the window area.
Masks
The Masks tab allows you to define visual masks for windows, these can be used to hide unwanted regions of the projected image.
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+ / – – Add or remove masks.
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Edit – Opens the mask editor to position or resize a mask directly on the preview.
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Window Selector – Choose which window the mask applies to.
Example Setup: Datapath Fx4 (2×2 Grid)
When using a Datapath Fx4, the device takes a single 3840×2160 signal and splits it into four 1920×1080 outputs.
In Igloo Setup:
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Create a new window with Width = 3840 and Height = 2160.
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Set Rows = 2 and Cols = 2 to divide the window into four quadrants.
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Assign each quadrant to its corresponding projector output.
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The Fx4 will then map each projector to the correct quarter of the input signal, maintaining alignment and aspect ratio.