I was exploring Lake Xanmeer Manor today and noticed a graphical glitch on both sets of stairs heading from the entrance toward the lake. When my characters gets close to the top of the stairs on either side, the texture of the stairs and part of the front of the house switches to a VERY low resolution.
I checked my settings and everything is on max (my PC can run this game at max easily). I also turned off my PC and turned it back on, but the issue persisted. I updated my graphics drivers and it still didn't fix the issue. I did a few Google searches to see if this was a known issue and came up with nothing, so I had some friends check it out, and they said it's happening for them, too. This bug occurred on PC NA, and I can confirm that it is occurring for all PC players and thus is not a hardware issue. I am not sure if it's happening for console players.
I decided to check the PTS version of the house because I didn't remember noticing it there and I knew the PTS hadn't been updated since before Murkmire was released. I can confirm that this issue DOES NOT occur on the PTS. I also noticed that my FPS is significantly lower there, around 60-65 FPS as opposed to 100, so maybe this graphical issue was a deliberate attempt to improve performance in this house by lowering the resolution of the entry level when players go up to the second level? However, it seems to be triggering too early so that the low-res portion is still on-screen when the switch occurs, and it is noticeable and immersion-breaking.
I have attached screenshots, and I also made a YT video illustrating the issue and asking others to submit tickets of their own. (Maybe overkill, but considering how much money/crowns you guys will ask for this house, it would be nice to see it get taken care of before you put it on sale!)