Survey Exhibition – Trade Fair Hall

Twenty trade fair stands in truss cages, 24 works from eleven series

VisualisationStageFree spatial study

Visualisation of a fictional space – not a realised project.

A trade fair hall of 90 × 84 metres beneath a 24-metre-high steel lattice roof. Twenty stands in a five-by-four grid, each a cage of aluminium trusses with its own walls, carpet and projectors – and 24 video works from all the series, wildly mixed: Minimal next to Sculpt, Ring Quader next to Veil.

The colour of each stand comes from its work: an analysis of the videos supplies the key colour, from which the side walls, carpet and fascias are made – blue for “Gegenlauf”, magenta for “Ringkern”, ochre for “Stille”. Works on a white ground run on white projection walls, works on a black ground on anthracite ones. This creates a field of colour rooms that constantly mixes anew as one walks.

Five stand types structure the grid: U-shaped stands with a back wall and two side walls, corner stands with a projection across the corner, open island stands with a double-sided central wall and two works back to back, two tower stands with eight-metre-high cages and large-format images, and two closed cabins that one enters through a door. An eight-metre-wide boulevard crosses the hall; the stands of the two middle rows open onto it. Around 350 visitors fill the aisles, the boulevard and the stands.

Technical details

What it takes to build this space: dimensions, equipment, brightness.

8 Panasonic PT-MZ882 projectors with ET-ELW22 lenses (short-throw zoom), 8,200 lumens each, hang from cross trusses. Each partial image measures 7.00 × 3.94 m with its bottom edge at 0.70 m; the throw distance is 5.83 m (throw ratio 0.83:1, lens shift -45% vertical). Calculated luminance on the wall: approx. 95 cd/m². Two Panasonic PT-REZ15 projectors with ET-C1W400 lenses (wide-angle zoom), 15,000 lumens each, hang from cross trusses. Each partial image measures 9.00 × 5.06 m with its bottom edge at 1.50 m; the throw distance is 7.53 m (throw ratio 0.84:1, lens shift -45% vertical). Calculated luminance on the wall: approx. 105 cd/m². 8 Panasonic PT-MZ882 projectors with ET-ELW22 lenses (short-throw zoom), 8,200 lumens each, hang from cross trusses. Each partial image measures 5.20 × 2.93 m with its bottom edge at 0.95 m; the throw distance is 4.28 m (throw ratio 0.82:1, lens shift -45% vertical). Calculated luminance on the wall: approx. 172 cd/m². 8 Panasonic PT-MZ882 projectors with ET-ELW22 lenses (short-throw zoom), 8,200 lumens each, hang from cross trusses. Each partial image measures 5.60 × 3.15 m with its bottom edge at 0.80 m; the throw distance is 4.64 m (throw ratio 0.83:1, lens shift -45% vertical). Calculated luminance on the wall: approx. 148 cd/m². Two Panasonic PT-MZ882 projectors with ET-ELW22 lenses (short-throw zoom), 8,200 lumens each, hang from cross trusses. Each partial image measures 6.80 × 3.83 m with its bottom edge at 0.80 m; the throw distance is 5.66 m (throw ratio 0.83:1, lens shift -45% vertical). Calculated luminance on the wall: approx. 100 cd/m². Alternatives, price range and all dimensions per device are listed in the equipment list; floor plan, section and axonometric view show the projection cones.

Room

The room of the scenario and how the images are placed in it.

Room: trade fair hall with steel lattice roof, 20 trade fair stands (truss cages) in a 5 × 4 grid, cross boulevard
Configuration: 20 stands: 10 U-shaped stands (2 of them tower stands with a large-format image), 4 corner stands (projection across the corner), 4 island stands (double-sided central wall, 2 works each), 2 cabins
Visitors (approx.): 350

Room	Width	Depth	Height
Exhibition hall	90 m	84 m	24 m
U-shaped stand	10 m	10 m	5.4 m
Tower stand	10 m	10 m	8.2 m
Island stand	10 m	10 m	5.6 m
Corner stand	10 m	10 m	5.4 m
Cabin	10 m	10 m	5.6 m

Projection

How the images are created: equipment, image size, distance and mounting.

8 × Projector

7 m × 3.94 m per image

Bottom edge: 0.7 m
Distance: 5.83 m
Throw ratio: 0.83 : 1
Lens shift: -45 % vertical
Mounting: on the truss

2 × Projector

9 m × 5.06 m per image

Bottom edge: 1.5 m
Distance: 7.53 m
Throw ratio: 0.84 : 1
Lens shift: -45 % vertical
Mounting: on the truss

8 × Projector

5.2 m × 2.93 m per image

Bottom edge: 0.95 m
Distance: 4.28 m
Throw ratio: 0.82 : 1
Lens shift: -45 % vertical
Mounting: on the truss

8 × Projector

5.6 m × 3.15 m per image

Bottom edge: 0.8 m
Distance: 4.64 m
Throw ratio: 0.83 : 1
Lens shift: -45 % vertical
Mounting: on the truss

2 × Projector

6.8 m × 3.83 m per image

Bottom edge: 0.8 m
Distance: 5.66 m
Throw ratio: 0.83 : 1
Lens shift: -45 % vertical
Mounting: on the truss

All partial images belong to one picture – one computer outputs them simultaneously and frame-accurately.

Real time and interaction

The film shows a recording. In the installation the work is computed live – and can respond to the space and its visitors.

Computation: live, in real time, on a high-end computer with a powerful 3D graphics card, NVIDIA RTX 4070 or higher; with many image surfaces also with several graphics cards
Output: all projectors in a room from one computer, as coordinated zones rather than separate videos
Interaction: 3D LiDAR scanners capture people and movement in the space; the work can respond to them
Fitting: mapping to the actual architecture – edges, columns, ceilings and floors

Brightness

Whether the image will be bright enough: luminance achieved against the target value. The line in the bar marks the target value.

8 × Panasonic PT-MZ882bright enough

Luminance: 95 cd/m²
Target value: 60 cd/m²
required luminous flux: 6,754 lm
Luminous flux: 8,200 lm

2 × Panasonic PT-REZ15bright enough

Luminance: 105 cd/m²
Target value: 60 cd/m²
required luminous flux: 11,165 lm
Luminous flux: 15,000 lm

8 × Panasonic PT-MZ882bright enough

Luminance: 172 cd/m²
Target value: 60 cd/m²
required luminous flux: 3,727 lm
Luminous flux: 8,200 lm

8 × Panasonic PT-MZ882bright enough

Luminance: 148 cd/m²
Target value: 60 cd/m²
required luminous flux: 4,323 lm
Luminous flux: 8,200 lm

2 × Panasonic PT-MZ882bright enough

Luminance: 100 cd/m²
Target value: 60 cd/m²
required luminous flux: 6,374 lm
Luminous flux: 8,200 lm

Equipment

The reference devices used for the calculations. Devices of the same class are equally suitable.

Panasonic PT-MZ882

Lens: ET-ELW22 (Short-Throw-Zoom)
Luminous flux: 8,200 lm
Weight: 18.6 kg

Alternatives (3)

Model	Lens	Luminous flux	Luminance
Barco G62-W9	R9801840 G lens 0.75-0.95:1 (Short Throw)	9,500 lm	110 cd/m²
Panasonic PT-REZ15	ET-C1W400 (Weitwinkel-Zoom)	15,000 lm	173 cd/m²
Panasonic PT-RQ35K2	ET-D3LEW200 / ET-D3LEW201 (Kurzdistanz-Zoom)	30,500 lm	352 cd/m²

Panasonic PT-REZ15

Lens: ET-C1W400 (Weitwinkel-Zoom)
Luminous flux: 15,000 lm
Weight: 28.7 kg

Alternatives (3)

Model	Lens	Luminous flux	Luminance
Panasonic PT-RQ35K2	ET-D3LEW200 / ET-D3LEW201 (Kurzdistanz-Zoom)	30,500 lm	213 cd/m²
Barco UDX-4K40 FLEX	R9862001 TLD+ 90 Grad ST (0.65-0.85), am UDX-4K 0,72-0,94	40,000 lm	279 cd/m²
Barco QDX-4K45	R9862001 TLD+ 90 Grad ST (0.65-0.85), am QDX-4K 0,67-0,88	45,000 lm	314 cd/m²

Price range and equipment list on request.

Drawings

Axonometric view, floor plan and section show the space and the projection cones.

Survey Exhibition – Trade Fair Hall — Axonometric view — **Axonometric view** · not to scale

Survey Exhibition – Trade Fair Hall — Floor plan — **Floor plan**

Survey Exhibition – Trade Fair Hall — Section — **Section** · not to scale

Glossary

Real time: The image is recomputed at every moment, about 60 times per second, instead of being played back as a finished video.
3D LiDAR scanner: Scans the space with laser light and captures people and movement in three dimensions – the basis of the interaction.
High-end computer: A computer with a powerful 3D graphics card – NVIDIA RTX 4070 or higher – that computes the image live and drives all projectors at once.
Mapping: Fits the projection to the actual geometry of the space so that image and architecture meet exactly.
Throw ratio: Distance divided by image width. At 0.8 : 1, the projector for an image 6 m wide stands 4.8 m away.
Lens shift: Shifts the image within the lens without tilting the projector – so it stays rectangular.
Luminous flux: How much light the projector emits, in lumens.
Luminance: How bright the image surface appears to the eye, in candelas per square metre. In a dark room, about 60 is enough.
Bottom edge: The height of the bottom edge of the image above the floor.
Synchronised output: Several projectors show parts of the same image; one computer outputs them simultaneously – computed live or as video.