DWG Export - Solids

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1.

Why does VW export solids, when "Export Solids as ACIS Solids" option on,

in a way segmenting each Solid by 4 cuts into 5 Segments ?

 

I think that started with VW 2016. No matter if latest DWG or older versions.

 

Segmentation of Solids :

 

 

 

2.

Also I do not understand why Extrudes, including a 2D Polygon will get exported as 3D Faces only,

while Extrudes with a 2D Polyline get out fine as Solids.

(WALLS always Faces only not nice too)

 

Polygon in Extrude left = Faces vs Polyline in Extrude right = Solid

(As you can distinguish by unwanted Segmentation of the Solids) :

 

 

 

 

3.

I get now DWG Materials in into VW.

But I don't get my VW Materials out of VW by DWG.