Sandy Castle Ruins Animation

Stop-motion animation of **sandy castle ruins** with *Q3R3* cellular automaton (CA). Initial design of castle with Blender, MagicaVoxel and animation with a 3D CA simulator. For [Voxel Challenge: The Ruins](https://blog.sketchfab.com/voxel-challenge-ruins/), [forum](https://forum.sketchfab.com/t/sketchfab-voxel-challenge-the-ruins/13657). See also [model of last frame](https://skfb.ly/6qqW9) with SketchUp texture. *** *Some background:* [Q2R](https://www.google.ru/?gfe_rd=cr&gws_rd=ssl#newwindow=1&q=Q2R+cellular+automaton&spf=1) is CA with two states (compare with [Game of Life](https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life) CA). Q2R2 is [reversible second-order CA](https://en.wikipedia.org/wiki/Second-order_cellular_automaton) with four states constructed from Q2R. Q3R3 is an analogue of Q2R2 in 3D. Q3R3 is also *reversible* CA and the castle may be restored from ruins using "inversion of time".