That's a better shader than I could ever produce. Do you mind sharing the settings ? I would like to use it for my freebie. With due credits of course.

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In my opinion, that was no accident. It seems like finding the exact geometry needed to produce that effect was a planned action.

Very possible. The architects were not invited at the opening ceremony but that wouldn't have been their only punishment if those in power had suspected the effect was planned.

Above : the antenna, about 115m (377ft) high. The crane on the right was used during construction and left up there.

The warning light on top was red during the DDR period,  then changed to white after the reunification. Now it's back to red.

 

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