so here is the thing, zbrush has no camera/perspective, its all just a fake.
That being said, the perspective is still better than using the orthographic mode, it will at least give you a rough idea what it will look like in the end.
I mean, unless your game is isometric to begin with.
if its supposed to be rendered in some engine, get it in as soon as you can, until you are pretty secure about the outcome
ZBrush's perspective is fake. Sometimes, you can find angles that demonstrate it.
That said, it's better than nothing. We see people with a perspective view; photos you might use for reference have it, too. You won't find any references that are perfectly orthographic or isometric, so if you switch your perspective off and try to reference comparing to those, it'll never end up correct.
You should use perspective and check from lots of different angles as you go. It wouldn't hurt to have a look at your model in a program with real perspective to double check it, too.
I guess this is a personal preference if you want to use it or not or if you want to copy something specific
I only found it useful for portraiture sculpting and even then only at the final stages
You will have better result if you check your model in other software from time to time
Knowing how something look without prospective is very valuable mainly for measurement sake , as prospective distort measurement You could use scan
to see how things look without prospective
Extra note : Also you have to know how much prospective to add in zbrush too much, too less or something close to human eye as all of them will give you different result
Don't forget, you can have reference models in your scene to check and compare to. But as was already mentioned, in the end the character has to look good through the camera/in game, so best check in engine early and frequently.
^ I'll usually use 85 focal length for humans. It's just going to be closer to a lot of photos you are probably using and it'll fisheye less at common distances to the mesh when you are sculpting..You'll just get used to ZBs perspective and how the camera looks in the end, but like mentioned above, checking in something with real perspective and lights can sure be interesting.
Replies
But as was already mentioned, in the end the character has to look good through the camera/in game, so best check in engine early and frequently.