Useful Mutation - optional sprite overrides
===========================================

Drop PNG files into this folder to replace the mod's artwork. Missing files fall back to the built-in art
(the third hand falls back to the left hand's sprites). Changes are picked up the next time the game starts.

  perk_icon.png      32x32   perk icon (inventory / HUD)
  perk_card.png      64x128  card art shown in the experimental terminal
  hand_normal.png    third hand, idle
  hand_grab.png      third hand, gripping a handhold
  hand_open.png      third hand, reaching (button held, nothing grabbed yet)
  hand_crouch.png    third hand, crouching
  hand_sprint.png    third hand, sprinting

Hand sprites should match the size/style of the vanilla hand sprites (the game ships them at 128x128 per pose).
