Exporting rooms as DXF

[ALHWO]

I'm interested in exporting rooms from revit to qgis, as DXF files. This is going okay.

The issue though, is that the polygons exported retains the walls (picture 1), which is not what I need. I want the rooms to touch each other, as in picture 2.

I am aware that I can get this by removing all the walls and create them with 'room separator', but that's also not an option for my projects. 

Is there any solutions for this? I've tried in 'Area and Volume Computations' to choose 'Room Area Computation' --> 'At Wall Core Center' and 'At wall center', but neither gives me a different result.

Picture 1Picture 2

[ToanDN]

Change Room computation to center of walls instead of face of walls.

[ALHWO]

As I mentioned in the post, I've already done that, with no change of result.

[ToanDN · Accepted solution]

[ALHWO]

Oh perfect! Thank you so much!