tinywmcraft

Data of tinywmcraft: train a world model of Craftax-Classic in under 10 minutes on one A100, then play it in your browser.

file	contents
train.npz	500,000 transitions: 250 streams of 2000 steps, 63x63 RGB frames
eval.npz	2048 clips of 8 real + 64 future frames, scored by eval.py

train.npz

array	shape
frames	(2001, 250, 63, 63, 3) uint8
actions, rewards	(2000, 250)	actions[t, e] and rewards[t, e] describe frames[t, e] -> frames[t+1, e]
dones	(2000, 250) bool	deaths only
truncated	(2000, 250) bool	episodes cut short by the collector, not deaths
episode_ids, inverse_temperatures, cohort, source_stream_ids, meta		collection details

An episode ends at dones OR truncated; the transition at the end stores the next episode's first frame. Train a done head on dones only.

Collection: 389,824 transitions from a frozen stochastic discoRL agent at a range of sampling temperatures, and 110,176 from a PPO agent in 210 episodes that eat a plant, mine a diamond or make an iron pickaxe, each cut 20-50 steps after that event unless the agent died first. Every one of the 22 achievements appears. Details in meta.

eval.npz

array	shape
frames	(2048, 72, 63, 63, 3) uint8	8 context frames, then 64 future frames
actions, rewards, dones	(2048, 72)	of the transition into each frame; dones marks deaths
valid_len	(2048,)	death clips end at the death
event, event_frame, event_names		the rare event in a clip and the frame it leads into

1536 clips are random held-out windows; 512 hold a rare event between future frames 4 and 16: 100 diamonds, 100 eaten plants, 100 iron pickaxes, 70 iron swords, 71 deaths in lava, 71 deaths by zombies or skeletons.