Reviewed

Name: TR_Interior_Showcase_Kynesifnar
Clean: Dirty. Make sure to clean out everything with TESAME, except for your cell, the cell’s pathgrid, the blank TES3 entry, and any custom items you made specially for the int. (There are 2 dirtied entries in this file, T_De_Sound_Waiting_Door and its script). Here's the TESAME tutorial.
Lighting: great for the most part, should change the light_de_lantern_05_S to one with a lower radius, because it’s causing a bit of greenlight
Northmarker: N/A (since there is no exterior to align it with)
Fits exterior: fits an ex_hlaalu_b_10 shell
Pathgrid: Not present. You need to make a pathgrid for your interior. Here's the tutorial.
Illegal to Sleep Here: Yes, correct
Gridsnap: Good

Bleeders:

All of your tapestries: bleeding into the wooden beam, move these up so the stick goes through the adobe. I've attached an image of the proper placement in this post.

Floaters:

misc_com_wood_knife (x2): the blades are floating (for the knives on the shelf)

Other:

The doors teleport to the other door in the int, making it an endless loop. Normally, doormarkers would connect interiors to exteriors (or other interior cells). But since an exterior is not necessary, disable “teleport” on both of the loaddoors so we don’t have incorrect doormarkers.

While I love the creativity of the mini-ancestor shrine you have going on the bottom floor, this is a bit too outside-the-box. Almost always, ancestor worship and these kinds of things are reserved for Ancestral Tombs and Temples. So I advise you to remove the skulls, urns, bonemeal, wall decal, and sound object. It’s not a bad execution, but for a commoner’s home, it’s a bit much. Also, remove the blue lights or change them to normal (since in TR, blue lights are reserved for places that indicate magic). You can repurpose this area into something more mundane, like a storage area or a reading area if you want to keep the books.

de_r_chest_01_gold1: this chest uses the rich wood, make sure to get a de_p_chest to match the rest of the interior’s furniture

T_Nor_Cm_Pants_03: these are Nord pants geared mainly towards “Skyrim: Home of the Nords”. Replace these with a T_De (or T_Com if it looks fitting) or vanilla pants

Note: I see you used a lot of stoneware. This is not technically wrong because stoneware can be used in interiors, but for the future, it’s nice to see a lot of the dunmer sets mixed together. Using the vanilla tableware, and then some of the TD extended sets like greenware (and blueware houses on the richer side) looks really nice in commoner homes. You don’t have to fix this one if you don’t feel like it, but just note it.

This is a fantastic showcase. Fix these things and I will recommend for promotion.

Review 2

Name: TR_Interior_Showcase_Kynesifnar
Clean: clean
Lighting: good
Northmarker: N/A
Fits exterior: fits an ex_hlaalu_b_10 shell
Pathgrid: mostly good, the spot by the upper door has too many nodes (the three closest to the door should be condensed into one), and the nodes that pass through the door on the bottom floor should be connected.
Illegal to Sleep Here: Yes, correct
Gridsnap: Good

Bleeders:

T_De_Furn_Tapestry_11: this specific tapestry upstairs is still bleeding the way the others were before

Floaters:

misc_com_wood_knife (x2): I saw that you tried to change these, but in the wrong direction. The metal is really much heavier than the wood so it should be rotated where the tip of the blade is touching the surface

Other:

T_De_BlueGlassBowel_01 was deprecated in the latest TD_Addon, so make sure you’re using the addon, where you can see the new assets or know which things have been deprecated and such. For the sake of the showcase, you don’t need to act on this but you should know it anyway.

Fix these teeny errors (yes, I know it seems pedantic), and I will recommend you for promotion.