What it does
A screen spanning a 2.6 mm main wall and a 5.2 mm side wall has two output groups with half the pixel density of each other. Drive them from one canvas at 1:1 and a layer crossing the join changes physical size the instant it crosses: same pixels, twice the millimetres.
LivePremier's answer is pitch compensation — a per-output-group ratio saying how much canvas each group's raster is worth. The manual gives it four sentences, and does not say which way round the ratio goes, what the field will hold, or what happens when the answer is not a round number. All three matter, and all three are what this works out.
It also argues with you about the reference. The ratio scales a raster up into canvas pixels, so the reference should be the group with the most pixels per millimetre; every other group then lands above 1.000 and scales down, which a video processor does well and nobody sees. Pick a coarse group instead and the fine wall lands below 1.000, is handed fewer canvas pixels than it has real ones, and spends the whole show upscaling — visibly, on the best-pitch surface in the room.
- H and V ratios ready to type into Web RCS, from each group's raster and pitch — or from its measured size, with the pitch falling out
- The canvas footprint each output group takes, and the screen canvas that results
- The error the device's three-decimal ratio field costs you, in millimetres, at the far edge of each wall
- Defaults to the finest wall as the reference, and says so when you override it
- Runs entirely in the browser with no backend, so a client's set design is never uploaded anywhere
Where it stands
In development. The arithmetic is not taken from the user manual: it was driven into a running AW LivePremier Simulator 6.2.73 and read back off the wire. Fourteen ratio and raster pairs were written to a real output's pitchRatioH and pitchRatioV and the resulting pitchedWidth and pitchedHeight recorded; those observations are pinned as tests, and they are what settled the direction of the ratio, the field's range, its precision, and the fact that the device floors the canvas footprint rather than rounding it. No pitch-compensated screen built from this has been driven onto real LED walls, and nothing here has touched physical Aquilon hardware — the simulator runs the same nlc-platform web application and the same object model, but it is not the switcher. It is not hosted yet either: build it and run it yourself.