[greendestiny]

You can try it yourself with commercial software: http://www.123dapp.com/catch

Scale can be hard to capture in photogrammetry, but in general the unrealness probably has more to do with the somewhat smoothed out (triangulated) surface that doesn't capture too fine a level of detail and the textureless (uncoloured) model they are rendering.

[mynewtb]

No need for commercial software! Try VisualSFM, Insight3D, Regard3D!

[r0muald]

Or OpenSFM: https://news.ycombinator.com/item?id=12835771