Thanks for the comments, guys.
1> Most of the geometry was imported into TC?
2> what is source of the white triangle on the cabinet?
3 > what is the source of the blurred light on the floor and computer screen?
1. The main problems with 3DS import are related to the incorrect location of some objects (see 3DSgeometry.png) it was fixed manually.
2. (Nice puzzle, Dean.
) Similar object is shown in the photo puzzle.png (red rectangles). What could it be?
What is your opinion about blue rectangle?
Vertical lines, what is it?
3. It is the light from the Environment with Sky texture 3D (see Sky Texture 3D.png) that is visible through the Loggia + portal.
See StudioWalk.mp4 (daft render with GI cache).