What A Boeing 767 Landing At Troll Airfield In Antarctica Looks Like From The Cockpit

Your comment reminds me of the Mount Erebus disaster.

"The Mount Erebus disaster occurred on 28 November 1979 when Air New Zealand Flight 901 (TE-901)[nb 1] flew into Mount Erebus on Ross Island, Antarctica, killing all 237 passengers and 20 crew on board.[1][2] Air New Zealand had been operating scheduled Antarctic sightseeing flights since 1977. This flight was supposed to leave Auckland Airport in the morning and spend a few hours flying over the Antarctic continent, before returning to Auckland in the evening via Christchurch."

The section "Crash into Mount Erebus" mentions how the snow covered mountain could not been seen against the white background of snow and clouds. https://en.wikipedia.org/wiki/Mount_Erebus_disaster

Same here. But, when I replayed the video I could see what appeared to be black squares (runway markers) when the 500 feet altitude was announced. It is amazing how more of them seem to pop up out of nowhere as minimums were approached

Your experiences around Sudbury remind me of my initial flight training at North Bay. All my training took place on Trout Lake. My first solo was on floats. By the time I took my flight test we were flying from the frozen lake. In both phases of training it was important to deal with lack of vertical references - glassy water and unbroken snow, respectively. Even today, a few decades later, I find I glacé to the side of the landing area for visual clues.