Len, that is really silly... Even if you do 'copy' the general situation of a diorama, inevitably the final work is going to be yours.
Let's take an example of this. Blockhaus has been giving us loads of ideas and images of buildings recently. Why? To pass on the experience he has in this field. Therefore, you are doing what everyone else does - get inspired by other work/techniques etc..
Now, you may have done it better, you may have done it worse but at the end of the day - it's still your work...
If you have any doubts about that, what is better, using someone else's ideas as inspiration - and doing something, or worse, sitting there agonizing and doing nothing?...Jim