This issue often happens because of extrapolation errors when using “Curved screen/Dome” scanning method. The maps generated after each scan are bad, which (unfortunately) cause the blending calculation to crash. To resolve, you need to redo the scans and make sure, that the generated maps are valid. Follow these instructions after each scan carefully:
- When using a fisheye camera, set the Surface Curvature to “Slight” (since for a fisheye, a dome or curved screen is not curved anymore)
- Deactivate the extrapolation distance (unmark the checkbox and set the distance to 0
- Hit “Recalculate” and open “Show Info” Dialog. There examine the “Camera Display Map” image. This image must show an uninterrupted gradient from red/yellow to pink/white.
- You will notice that parts of the projection are not covered anymore. That’s because the extrapolation is deactivated. Increase the distance step by step, always hitting “Recalculate” until all visible projected areas are covered with the testing pattern. View the “Camera Display Map” to be still a proper looking gradient.
Once all projectors are handled this way, having a proper projector map, the blending calculation won’t crash.