This may be an issue of focus and of what you are actually using your as loci?
Here are some consecutive loci in my house:
Parking space,
outdoor trash bin,
steps leading inside,
bathroom toilet,
bathroom sink,
dining table,
entry door,
couch.
While the “general terrain” of my house is similar… If I focus on each loci as its own little world and allow everything except the current loci itself to fade away, each of those loci present very different textural and visual feels.
The parking lot is hard pavement, dark colored and slightly dirty.
The trash bin is smooth plastic, bright green, smelly.
The steps inside my garage leading into my house are wooden, slightly rough with a wood stained visual texture.
The toilet is bright shiny porcelain.
The sink and counter is speckled stone, animated with rushing water from the tap.
The table is like a ledge, bright wood, smooth, spacious.
The front door is a vertical face, white painted, sectional.
The couch is lush, red fabric, squishy, soft.
So taken as individual bits of “terrain” they are very distinct. Plus, they have a distinct advantage of being logically connected in a natural path that I’m already intimately familiar with. As Doug pointed out, the “transversal rule” is the natural and easy flow through a singular meta-palace. In the palace version of my house, there aren’t sharp turns or really any other items or loci, I’ve culled the space down to just those “terrains” and it is effortless to navigate and differentiate.