Hmmmm, good question sgirty,
I'll throw my 'yakkity-yaks' worth in here if it's alright. (I'll make an effort to keep it short).
I've mentioned before that when I was a young boy and growing up a stone's throw from NYC, I was privy to getting 'backstage' as it were, at the Museum in New York City (now called 'the Museum in the City'), as well as the New York State Military Museum upstate.
So, I got to see (even though I couldn't process it as well as I should have.....I was young and not really realizing what I was 'privy' to

) some real experts at diorama/model-making.
When it comes to dioramas, Sealhead made a good point with his "the depth is lost" remark. But at the same time, what must be remembered is that the majority of these dioramas are designed with a generally fixed POV in mind. Is
every single face on each figure a 'masterpiece'?.....No. But the main focal point figures are. Is the 'flowing river' effect the same back underneath the canopied trees the same as right at the camping spot?.....No. But the 'camping spot' and the accuracy of the clothes the figures are wearing is impecable and historically accurate.
When I became high school age, I took up photography and did a little modeling work. To make a loooong story short, suffice it to say that the women who posed for the pictures looked
quite different from the final shot as they did when they walked in the door.

So, photo-manipulation is certainly a possibility in regards to the displaying of models, but my impression is, is that it is generally limited to lighting and the correction of same.
And there's also the comparison of what I'll call the 'Euro' style (I just know I'll get some flak for this, but I
did get this phrase originally from a magazine) and.......everybody else's 'style'. And, what I'm talking about (in short) is the excessive use of both washes and especially DRY-brushing. Again, I won't go into a long tirade about the pros & cons, but I will instead share one of the very first, and primary lessons I learned about
miniature model making, and that is; "Paint to scale". Meaning, don't try to make the subject matter larger than it is (unless there's a
specific reason why). If the 'accent' you try to apply to your subject matter
looks like an 'accent', then you've gone too far. Doing work like that is simply a subconcious 'pat on the back', and actually works to make the model look like a 'model', and not a miniature version of the real thing.
I will not mention any names (for fear of 'flame'), but a significant amount of "Masters" unfortunately employ too much 'accent' in their work for my tastes. And as a comparative example, I will cite someone's work (and I
will name names) that I genuinely feel is truly an accurate 'miniaturist' in his heart, and who's work honestly exemplifies a 'pure' form of creating a miniature example of the real thing. His work is never overdone, and I dare you to find any decent amount of either washing or drybrushing on any of his pieces.
The person I'm talking about, and the one who I would indeed
pay to sit as his student, is our
Gunnie.
If you haven't already, take some time and peruse his site
guntruck.com . His stuff is simply magnificent.
{said in a whisper}
(psssst.......Jim, you can send the $20. you paid for this endorsement to me anytime you want.

).
But, now that I've discovered I have broken my original promise, and
not kept this post short......I will simply shut-up now...................................
Tread.