Render Material Imports - DWG and IFC

Somehow I haven't been able to see Render Material Assignments,
from my clients Revit Exports, in Bricscad.

1. DWG - Assignment
   Materials are somewhat imported, but no Assignment at all.
   All Entities are set to "By Layer".
   But I think that is not true.
   In this case,
   the few Layers are used for Objects with multiple Materials,
   like a whole Curtaiun Wall System, Glas Panels and Beams.
   Also each Entity has its Color assigned by Objects
   (Which fits to different Material usage, from my experience)

So I assume that all Materials are applied "By Object"
but Bricscad generally skips such Assignment and always sets
it to "By Layer " instead.

2. DWG - Materials
   There come in far more Materials in DWG than there are in reality.
   In IFC/DAE I have about 75 different Materials, in DWG there are
   about 750 Materials !?
   They all come in like :
   RevitMaterialDefinition9891450_1208558

What I notice is that there are often Duplicate Materials (up to 4 ?)
for the first number block, they only differ in the 2nd number block.
And given the names of the (missing) Immage Textures,
I come to the conclusion that all :
RevitMaterialDefinition9891450_XXXXXXXX
should in fact be a single Material only,
where the XXXXXXXX number describe just the Material Shader Slot like :
RevitMaterialDefinition9891450_Diffuse
RevitMaterialDefinition9891450_Bump
RevitMaterialDefinition9891450_Transparency
.....
Also they miss their proper "human readable" naming.
(Not sure if it got skipped or isn't in DWG)

3. IFC - Assignment
   Unfortunately, again, all Material's Assignments lost.

4. IFC - Materials
   Material Import looks much better.

• Only a single Material Definition for each Material
• human readable Materal Naming

Unfortunately all Texture Assignments/Paths got lost.
(Does that require IFC 4.0 ?
Or was that just needed for embeddeing Image Texture Files into IFC ?)