Top: Owl’s windbeaten “treetop house”, in a colourkey by Neil Ross. Below: An earlier layout for that same shot, with Owl’s house still seated in a conifer and some later designs for the tree as a broadleaf, both by Manu Arenas. Bottom: Manu’s eerie designs for the spiral staircase Mouse escapes on in that sequence.

See “The Gruffalo” this friday, Dec. 24th, 10.40 am on ZDF,