Proof of concept two

[Tas_mania]

Thanks ofnuts. You may have been referring to 'ofn-path-to-cylinder'. I'm going to check that out. For now I have resolved this riddle.


I was overthinking this. The back rotation is just the front reversed because only the sphere is transparent not the animation on it
I scaled the back smaller by 20px but only to the vertical - leave the horizontal the same so it joins-up with the front series. Also applied a GMIC colour blindness filter to the back, to give the back some spatial difference to the front.

While doing this I found the back wasn't a continuation of the front because it was reversed. The fact there is an animation on the moving waves makes this hard to see but it can be solved by this method.
pack the back series of layers > flip horizontally.
unpack and reverse layers > pack and flip horizontally again and unpack > rename layers.
I don't understand why this is but it seems to work

Finally I used ofnuts interleave layers to merge front and back series, they need to have the same number of layers and be the same size.