…Not quite sure what you mean about not being in 3d - the windows are in the model, in 3d ,and show in the Elevation scene. I just used simple windows, but you coudl make them as detailed as you like or apply the tecnique to any object (furniiture, plants, etc).
The same technique (2d and 3d versions) can be applied to all furniture, fittings, etc (not just windows).
Do you mind posting your example SKP file? Im just curious to see how it’s set up.
In any multi level home I create differnet levels or structures, each a seperate component.
One of the problems I wanted to overcome was that of generating a (simplified) 2d floor plan (per level) without the use of multiple section planes per level.
I notice your floor plan appears to be a literal slice through 3d geomtery, but I needed to adapt my workflow to scale up to projects involving drawing scales as high as 1:1000. That’s where symbolic 2d compoments (including widows, furniture, electrical fittings,etc) are essential.
Simple 2d elements are also very fast to render in LayOut, and can still be legibile at scales up to 1:1000.
My 2d/3d approach is also designed to adhere to my local building regulations, which require basic plans that look like this.. The detailed views (explaining structure or construction methdology) are isolated exploded or zoomed in perspective diagrams, not necessarily connected to the main 3d model.
I’ve personally never enjoyed managing numerous section planes…some models can have over 100, and it just gets too much. 100 tags, 100 scenes, 30 styles, 100 section planes…then LO tag/style/view adjustments…yikes.
I acknowledge that this “hollow wall” technique is not for everone, but it does acheive your request of being able to colour the different walls in unique colours/materials without having to create seperate geometry
I always find it educational to see what other professionals are producing with SU+LO.