Ref:

https://news.povray.org/povray.binaries.images/thread/%3C678b9010%40news.povray.org%3E/

Playing more with matrix transforms mixing shears (and by side effect 
rotation) led to the attached animation.

The entire animation part of the set up was:

     matrix <
         1.0, (frame_number-1)/60, 0.0,
        -(frame_number-1)/60, 1.0, 0.0,
         0.0, 0.0, 1.0,
         0.0, 0.0, 0.0>

Then using +kff480 on the command line to render 480 frames.

There is a 'scale 1/6' of the checker pattern following the matrix 
transform in the base scene - which is slowly countered as the frame 
number increases.

I don't 'really' understand what's happening in total. In any case, it's 
cool, though, not as trippy as Josh's earlier post. :-)

Bill P.

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Attachments:
Download 'matrixfun.mp4.dat' (747 KB)