Decision Arena
A cylindrical, fully surrounding 2D projection environment used for workshops, meetings and decision-support sessions. Groups stand or sit inside the cylinder with data around them. There is no stereo here, which removes a whole class of problems — but nine blended projectors introduce their own.
At a glance
| Geometry | Cylinder, 6 m diameter, 1000 mm base height |
| Projectors | 9 × Epson EB-L510U, 1920 × 1200 each |
| Total resolution | ~12288 × 1200 including overlaps and blends |
| Stereo | None — 2D only |
| Compute | 2 computers, 4 and 5 outputs respectively |
| Playback | Dataton WATCHOUT 6 (with SGCT / C-Troll capture) |
| Calibration | VIOSO, GPU-based on the NVIDIA cards |
| Planned | Migration towards C-Play |
Signal chain
Two computers drive nine projectors — one contributes four channels, the other five. When a fault affects a contiguous block of four or five channels, that boundary is your first and best clue about which machine is involved.
flowchart LR
A[Computer 1<br/>4 outputs] --> C[VIOSO warp/blend<br/>on GPU]
B[Computer 2<br/>5 outputs] --> C
C --> D[9 x Epson EB-L510U]
D --> E[Cylinder surface]
Record which computer drives which projector numbers, and the physical position of projectors 1–9 around the cylinder. This mapping is the single most useful thing missing from this page.
VIOSO calibration
Warp and blend are applied on the GPU by VIOSO rather than inside the projectors. The practical consequence, and the cause of a recurring fault here: anything that changes the display topology — a GPU driver update, a projector dropping off and returning, Windows re-detecting displays — can invalidate the calibration and leave the image warped or misaligned even though every projector is working perfectly.