I’ll try turning them off to see what happens. With HDR on, I basically meant ALL Special K’s default HDR settings (like 10 bit/11bit enabled). I also messed with other settings to see if it was something else but nothing had changed. It only affects that specific area in the Paris level. The rest of the map is perfectly fine from what I can tell.
I had a similar issue after just testing Crash Bandicoot N. Sane Trilogy again (requires 8bit remastering to display an image in HDR), even though it now renders properly in HDR. Curiously, it seems the purple stuff is only affecting the Fur Shader on Crash (and background is bugged).