Ok, so really I will need to use two different renovation filters to get the results in 3d, i.e. 'New Construction' in the plan view so the red lined 'to be demolished' elements are shown, and then the 'after demolition' filter in the 3d view with 'hide' selected for the items to be demolished. This works for me now which is great! Thank you kindly ejrolon!
Regarding the renovation status filters, these still do not work entirely correctly even with a clean template file. I clearly have some kind of bug which is a complete pain! The windows / doors now show as red broken lines and the walls underneath them automatically turn to the 'New Construction' lined hatch which is great, but unfortunately, the default wall background fill still goes to white (it was grey before) instead of transparent, as set-up in the renovation filter settings, when I select a wall as 'to be demolished'.
With the time this has taken to try and get to the bottom of this issue, I think for now I will just use the old school system of putting the elements to be demolished on layers and hiding them whilst drawing red dashed lines manually for reference on the plan. It's a real shame as I was hoping the wonderful ArchiCAD would allow me to avoid this, but alas, not this time!
We have a new version of AC16 in the office, and as AC17 is also on the horizon, I think I will install one of these and try again.
Thanks to one and all for your helpful suggestions! Support on here is excellent as always!
Paul
Paul Griggs BSc (Hons) MCIAT MCIOB
Chartered Architectural Technologist
AC23, i5 3570K Processor, 16gb RAM, NVidia 570GTX Graphics Card, 250gb SSD Drive