In prepro a basic 3D model of the dam, based on a limited data set, coupled with satellite imagery enabled Porrmann to use photogrametry to construct a draft model. Later, a laser survey crew on site precisely measured distances and angles to update and adjust the existing 3D dam model. The model was ingested into the disguise media server to previsualize the projector positions relative to the dam and show “what we could expect from rock and canyon shadows,” Henning says.
CT specified 60 Barco projectors, both W26 26,000-lumen and W20 20,000-lumen models,. The output of the projectors generated an incredible 1.17 lumens – an official Guinness world record among projections. Bob Loney of Tekamaki was the senior projectionist working with a projection crew of ten.
All five of CT’s new 4×4pros were deployed at Hoover Dam. “We ran the system in a fully redundant configuration. To minimize the signal transmission distance, the servers were staged with the projectors, except for one unit used as an editor to allow the show programmer to work in the space with the show director and content team.” Henning explains.
“Due to the power of the server we were able to put all ten channels on a single server and not worry about performance issues,” he points out. “That made is much easier than having to divide the channels across multiple servers.”
Porrmann says that, “being in possession of a 3D model of the dam allowed us to calibrate the 10 projector feeds in 3D space, which in turn gave us the option to use a new feature in disguise: Auto Soft Edge. This calculates the incidence angles of projector light to the surface and then blends the constituent images into one big canvas within seconds.”
Porrmann used the disguise QuickCal feature to calibrate ten key projectors in the stacks. “The remaining 50 projectors were siblings that were aligned by projection,” he says. “I’ve been using QuickCal for a long time now – it’s an indispensable feature.”
Henning hails the 4×4pro’s new 10Gb network capabilities, which permitted the team “to transfer content in a matter of minutes instead of hours.” Porrmann agrees. “Using the new 10Gb data distribution allowed us to have an editing server with the camera and show direction team,” he says. “All contents were loaded there and came to us, at the projection tower, via fibre. We ended up copying 130Gb in about nine minutes, even with a mile of fiber between computers.”