Attached photo is a 'cross-eye' 3D stereo.
To make it work slowly cross your eyes. This should form two extra images between the originals. If you adjust your eyes until these two extra images align with each other and concentrate on looking at this image you will have a lovely 3D image with the two originals in your periphery vision each side. Not everyone can do it, but those who can are rewarded with a picture with amazing depth and clarity.
This taxon is closest to C. bartlettii and is considered our local form of it.