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The film is adapted from a children’s picture book by former Bloom County cartoonist Berkeley Breathed. Director/writer Simon Wells and his co-writer and wife Wendy Wells have ruined the book quite nicely. They’ve replaced Breathed’s jolly, cartoonishly gross drawing style with airless, joyless motion-capture animation that hasn’t advanced appreciably since The Polar Express came out in 2004. The human characters remain woefully unlike flesh-and-blood people, while the Martians are re-envisioned as adorable lavender-skinned humanoids with heart-shaped faces. They won’t scare anyone. The movie’s attempts at introducing beauty (namely the element of color in a colorless Martian society) are ham-fisted and flat. As for the action set pieces, we saw better animated sequences in Tron: Legacy.