Very many thanks for your kind words on the GIK Acoustics Art Panels. In my art design concept (in 2018) I had initially selected two (or possibly three) ‘abstract’ forms - there were millions (well thousands at least) from which to make a selection. However there are certain limitations - some of the images do not scale correctly to fit the panel size one might choose. Then the image quality in the database(s) may be too low a resolution to be suitable for printing at such scale. I spent days (weeks even?) on this task. At one point I even tried to get a licence for a Kandinsky!
The Tryptic set covering the TV were initially designed for the left wall, with the other image (now on the left wall) intended for the sliding panel design to cover the TV. Initially, I only ordered the Tryptic wall set in 242 (2 inch) panel thickness with the specific abstract artwork. From an acoustic point of view - the panels should really have been the maximum thickness available (4" or even 6") to hang on the left wall.
However this ‘error’ later turned out to be serendipitous as the TV screen I desired and ordered was too big to continue with the sliding panel concept. Fortunately I could move these 242s to hang on the TV and remain within the weight limit of the electric mount. At that point I went back to my GIK Acoustics account to recover the abstract art for the original (centre split) TV cover design and implement it as a single thick panel for left wall first reflection placement.
Previous posting and discussion: Media Room - Art Concept design and development.
Re your question about the measurements: All the charts shown above have the Linn Space Optimisation feature turned ON. If I used the Overlays presentation mode in REW I could show the effect of Linn SO for these set of four measurements as the first measurement has SO OFF.
However (I think I mentioned elsewhere), since moving my loudspeakers and sub bass more towards the centre of the room, Linn SO has decided it does not need to do much.
You may recall that my recent focus has been the evaluation of the products I borrowed over the Christmas period: the Acustica Applicata DaaD and in particular the Chord DAVE DAC.