This comment only further cements your lack of understanding of how perspective works in art and technology (and possibly reality).
Go take a picture of the front of your house with a camera. Congratulations, you have a 2D image, just like a sprite. Now tell us how you're going to get the left/right/back/top view of your house from that same image. Unless you live in a perfectly symmetrical cube where each side looks exactly the same, you can't. You cannot rotate a 2D image to see a building's side in the same way you can't manipulate an image of the front of your house to look like the side of your house. Similarly, you can't start with an image of the side of the house to get an image of the front or back of the house. You can't see the front and backs of Pacman because he is a 2D profile image that exists in a 2D gaming environment.
Now let's be more outrageous for the heck of it and say you DO live in said perfectly symmetrical cube. If the sun is coming down due west from the front view of the house, then it casts a shadow to the eastern side. That's your photograph of the front of the house. If you view the house from it's left side though, the sun would now be behind you and the shadow in front of you. If you view the house from the back side, the sun is now due east of the house, casting a shadow to the western side. Therefore, even in the outrageous example of living in a perfectly symmetrical cube where every side of the building looks exactly the same, you
still can't re-use the image of the front of the house to replicate the other views because the highlights and shadows would not match up anymore. That's what the FoE devs are saying. Your visual perception of how anything is, down to texture, is based on light's ability to bounce off things and into your eyes. Nothing is going to look right if you have one image composed of multiple light sources with highlights and shadows going in every direction, unless you want to play the "Elvenar is a fantasy game and it's possible there are multiple suns in the sky" card. And even in that ridiculous scenario, adding more light sources would mean less shadows so they still won't behave as you'd expect. Either way,
@satchmo33 will prob be upset you've ruined the pretty graphics.
It’s mentioned in the Mischievous Therapy Q&A I linked, explained directly by Elvenar devs Timon and Thiago.
You've only proved you still don't understand
basic perspective. If you change the vanishing point and horizontal line, you get a completely different image. The art department needs to redo every building they've ever put out to make this work. Not a big ask at all! How lame of the devs...