
Setting this as my Pattern, the Scale is 25.

With the same settings on the Draw tool, draw a line across the
top of the Middle Wall.
As you did with the Baseboard, draw the lines for the Left and Right
Walls.
After the Border is done, Effects/3D/Inner Bevel/Custom, Pillow2
Preset.
If you didn't save and name this preset from an earlier tutorial, you
should do that now.
Next, Effects/3D/Drop Shadow. Use the settings below.
Either use the dark gray for the shadow Color, or match a color to your
pattern.
Your layer palette should now look like this.
Take note that the floor and ceiling layers are below the walls.
The top border and baseboard layers are above the walls.
And here is my template 2.psp. I am now ready to decorate!
Sorry.......this part is all up to you!
Hint: When getting a door, cabinet or wall unit to fit on the side walls, use the Deform tool just like you did when you deformed that first left wall. Couches and chairs do not deform well.