1. On official Furniture and in Contributions properties files I've add:
doorOrWindowWallThickness#nn=xx.x
doorOrWindowWidthDepthDeformable#nn=false
for all doors and windows which have specify the doorOrWindowCutOutShape#nn=xxxx parameters
for some of them I need to add also the doorOrWindowWallDistance#nn=xx.x
I verify all to look correctly on 7.6 and 50 cm wall thiknes.

2. On Furniture.jar:
- add new category: Decorations; Geometry; Light sources; Roof
- rename category "Staircase" to "Staircases & railing"
- verify all obj file and add mtl files in contributors

3. On Contributions.sh3f:
- verify all obj file and add mtl files where neded; some of them I regenerated by SH3D
- create separate folders for all furniture (170 from 469); modify properties accordingly
- prevent from loading some furniture (ignored#nn=true):
-- which are already in official Furniture (25)
-- those which are identical as object but only with different colors (9)
Note 1: who whant to restore some of them is souficient to comment the "ignored" line.
Note 2: to prevent overwriting the original I save this with Contributions-M.zip ("M" from modify)
Note 3: I don't modify the translation in specific files;

Who want to test them could be downloaded from here:
Furniture ; Contribution-M
If something went wrong or suggestions please indicate the furniture name and id number.