These images won't embed, but these were early renders for the new arena in Edmonton:
This was Rogers Place about a year and a half before groundbreaking...
The Community Rink took the brunt of the value engineering. The rest of the exterior mostly survived, but reality doesn't look quite as slick as the renderings.
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And of course, there's this...
Glass curtain walls look great in renderings but they're almost-always the first casualty when things actually get built.