разобрался, при импорте надо распаковывать архивы...

просто рисовать не выйдет - но вы можете использовать модели!!
по простому - берите коробку и ставьте ей размеры скажем 1*1*100см - будет полоса
или даже найдите в сети готовую можель провода и импортируйте её )

да, и весьма просто - вверху окна + нажмите - создаст новый уровень
у каждого уровня можно задать пол, потолок, их высоту, цвет (текстуру) прозрачность
а если вам надо сделать отдельно подробным образом перекрытия - просто сделайте их в отдельном уровне

as a simple option - for all the walls in the 3D dialog.
but it is better in the properties dialog for the selected wall wall. to make transparent (translucent)

support the author in the program must have the ability to tilt objects! and it is not only the roof, but also a lot of decorative elements and shapes of the interior require the diagonal elements of

the ALT key makes obtane the action of magnetism in the settings
and separately on the panel it will be extra

the ceiling, especially the ceiling of complex shapes or mansard roof variants is very difficult to scale to draw beams and other sloping elements
Please add the ability to create a rectangular element of a given section with tilt, preserving aspect ratio section.

[Note from moderator: removed ...

Add the ability to "glue" the 2 walls.

[Note from moderator: removed Russian translation]

for ease of design it is necessary to see in 3D mode, type in "cut"
please add this viewing mode

[Note from moderator: removed Russian translation]

Request:
make the ability to set the transparency for the walls.
need manual transparency level from 0 to 100%
this is to allow for a 3D plan is more convenient positioning of objects.

[Note from moderator: removed Russian translation]