Thanks for testing some so quickly, really appreciate it! What resolution in the game settings are you using, and do you have dgVoodoo running too?
I only upscaled the dining room walls, haven't touched it otherwise - though upscaling really improves your views of stuff that you are closeby. Do you have midmapping on, because I only test with that setting enabled.
Not to say that I "only" upscale in this project, I tinker with stuff and try it, and see what happens in the game at the native resolutions and running dgVoodoo. Originally I heightened the contrast on the Room 25 bed texture for example, which made it look nice and fresh and crisp - but then it horribly clashed with the plaid on the couch very badly (lol), as the bed and couch (and chair) share that same texture. A few textures I built from the ground up, for example the bathroom wall tiles, the maple tree leaves (the first tree you encounter as you leave the hotel), the rusty barrels, the cobble stone paths and the grass/dirt patches right outside the hotel. I understand that this is not for everyone, purists will loathe that, but some textures just don't make a lot of sense when "only" upscaling.
And yes haha, you noticed I didn't touch the fountain as it was animated and I have no idea what I'm doing. These files weren't loaded with loading just the scene (as they are animated) so I missed them and had to manually skim all the graphic files to even locate them. Anyway, here is an upgraded fountain pack, just dump the files into your custom folder!
https://mega.nz/file/9nRCFKRT#tWWex-OE6 ... JbHIlyrZ44
The old "leaving"' sign was a brown one with white text and an ugly red cross. I changed it to white with a red slash like you would see in France.