you're absolutely right: there are still shameful sins of perspective illusion...
If you're referring to Leonardo
there are some examples of errors (perhaps wanted or not) of perspective in his works...
One of them is the right arm of the Virgin in the Annunciazione, Uffizi of Florence
Instead, from what little I know about 'History of Architecture'
, the rules that are used routinely for the 'perspective construction' are those of Leon Battista Alberti
(but I'm not really sure).
Indeed, these rules are heavily violated in my latest preview!
Fitzcarraldo wrote:...the top of the tube looks very realistic...
me too; is the only part of the picture taken from internet that I left completely unchanged!
In addition to those you've listed there is the problem that the definition of the flat surface is totally achieved by lighting and not geometrically (this is usually a bit worse starting point...).
I will also try to bring out the mesh and the internal fonts (also the shadowed/masked effect).
There is still no reflection on the front glass (but in reality this is intentional because I wanted to add only at the end).
...do not bother about fussiness, indeed this help me to discover and point out all the flaws...