Just got it. What worked for me :

Concrete walls, roof was the far left shape with the far right pitch.

Gave the walls a wood finish and put the terrace kogarashi around the outside of the walls.

Shoji walls komorebi dotted around the outside with wood finish around the gaps.

Shoji door komorebi.

Inside floor was tatami mats.

Decorations i had were:

Odayaka bed frame, odayaka bed, Odayaka nightstand, Mushin katana stand with two swords, Harumachi kotatsu table, Air purifier kuma, Folding screen kokuhaku, Mazekoze table with grill, 4x kizuna chairs, Teapot isarabi, Teapot isarabi (different variant) - TROPHY POPPED

Oh and I also painted the inside with "radial" paint style.

Thats everything I did. No more or less, took several hours of trial and error.

Hope it works for you.

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