Sequence in its entirety animated by Tatsuzou Nishita. Split in two to bypass filesize limitations. About half a dozen cuts required to get rid of flashbacks, 3D animals etc. The scene plays out differently in the movie and is approximately 30 seconds longer.

Second half:
https://www.sakugabooru.com/post/show/112061

Genga:
https://www.sakugabooru.com/post/show/112056
https://www.sakugabooru.com/post/show/112057
https://www.sakugabooru.com/post/show/112058
https://www.sakugabooru.com/post/show/112059