Thanks chris.
I’m beginning to see two different problems with photogrammetry on buildings, from an architectural POV - first with flat featureless surfaces, second with things like the linear moulded detail of joinery or carved stone.
The first I understand - little or nothing to be grabbed as a distinctive and unique feature to locate in multiple views, as every bit of the surface looks same as any other.
Beginning to realise that the second may be similar - though distinctively non-flat crosswise, they are still uniform linearly so nothing distinctive to locate lengthwise. I guess corners and curved work are easier.
Both cases, at v high resolution, the system may find paintbrush irregularities, or natural grain if unpainted, but high res won’t help with truly featureless factory finishes.
So you suggest external re-modeling and I can see that would make it look nice - but reliable as factual accuracy? Linear mouldings would be idealised guesswork unless isolated bits came out clearly. Maybe flat surfaces could be inserted - but again relies on isolated bits of clear surrounding perimeter, to orient their plane. Do such vital clear bits actually happen and can they be relied on? Especially when it’s window woodwork complicated by adjacent reflections.
Improving algorithms - yes please! What do you mean by classification systems for selecting different parts?