Holy shit that's a nice find !
Forest (that's his name?) has been moved to the right.
The plants' have been replaced (the one on the right was aliasing even in the original version).
I can't tell if this has been done using image editing or if the actual pot and herbs have been altered in the original 3D scene file.
I would go with the former.
I did some quick digging in the orginal GC files and the other find was this:
The mansion was textured with
close-ups in mind, they used very high-res textures for the time. It's basically a CG movie of the 2000-era.
I thought that maybe they tried and there were too many artifacts because the source material wasn't of enough quality, but no.
What this means is, rerendering wouldn't bring about too many artifacts of whatever kind(even if it did they could just upscale the source textures instead ... but I guess that's too much work).
The source material is high-res itself. Just look at the material applied on the "S" shapes in the garden and the level of detail even when the viewpoint is really close to the chair.
This is really maddening because we get upscaled images that are retouched by hand instead. Well I guess we should be happy it's getting ported.
Background-wise, this is nothing more than a quick job (for now ?).