Is Dimension the best tool for creating cityscapes in 3D?

check out https://cutsceneartist.com/ for how things work type examples

and https://juliansolomon.wetcircuit.com/ for this is what she makes in Unity examples

the face capture vids are a type of phone animation where people use their iphone to record in real time then show it on a puppet... it may be an option in your farm senario where you need 'interactivity'

the limits of Mac tend to be hardware yes with Windows systems easy outperform them in rendor times that julian rendor is very much the top of what is possible on Mac but its still a cartoon i.e, not trying to trick the eye into thinking its a real human. what a Mac rendors in 2 hours takes about 20 nins on a Windows system for 1/2 the cost or less and the difference between Unreal and Unity is that julian character needs custom lights and skin [which she basically had to invent herself] in order to look that good... her stuff may not be what you need but its worth looking at and asking her questions just to better understand Unity

when you want to navigate [move around inside the area] thats 4D... 3D is static

this 4D type of software is called 'machinima' or just a game engine

best tool = Iclone Windows systems only and $

other good options are Unreal or Unity [Mac user]... these older engines have been modded into learning tools that both have forums and lots of fans + they start out free but you will probably want to buy a few assets for which ever one you decide to go with

Adobe does have Substance which they call Stager... its sort of a Blender modeling tool bolted into Dimension and charges the earth for it and they also an app Aero which is very limited kind of 4D that may be able to do what you want but is a dead end

In fact, I want to simulate and navigate a farm. So natural elements are also important.