See, what they need to do is update the graphics on 1 & 2.
So, how? You mean retain 2D isometric graphics, but do something like 32-bit color? IIRC it used an 8-bit palette.
considers
It might be possible to run it through one of those AI upscalers, get double resolution and 24-bit color.
I have no idea how well they work on things with alpha masks, though.
There are some open-source engines that can use the isometric Fallout data, I believe.
googles
I think that FIFE is the one I’m thinking of, but it looks like they headed off in the direction of being a generic RPG engine, and I don’t see reference there any more to Fallout in the docs.