There are in-situ photos of sugiyamanum, I have seen them once on a japanese website once... But again they can be staged ( like the insitu photos of ooii, or Averyanov' photos of vietnamense in the wild).
For lots of the plants die quickly in cultivation, well... it is not big news. The plants do not make a good root system (big leaf, nearly no wild roots to support them), and either they die before they make a good root system, or they restart as seedling-sized plants ( like many wild collected sanderianums). intaniae apparently comes from an exceedingly wet area, the roots are entangled in tree fern roots and moss, and they need a lot of water, the leaves can be up to 80cm+, and the whole clumps when they are collected have no more than 10-20 roots, broken at 5cm from the rhizome. The roots are always hollow because of the dehydratation. The plants cannot pump enough water to survive, and usually they are too weak to survive.
A photo from this spring wild collected intaniae here:
Big plants, shiny soft leaves ...
And the roots:
To restart a plant like that, good luck :evil:
That's why most of the collected plants never bloom in cultivation, they die before (same for zieckianum, many sanderianum, many gigantifoliums...). There are not that many good growers, and the good growers anyway have to be lucky enough to get good plants, or it is a failure.