/usr/share/afterstep/backgrounds/Gradient_Textures/ is in afterstep-data 2.2.12-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/afterstep/backgrounds/Gradient_Textures/.include
/usr/share/afterstep/backgrounds/Gradient_Textures/Blurts_Michelson
/usr/share/afterstep/backgrounds/Gradient_Textures/Blurts_Michelson.mini
/usr/share/afterstep/backgrounds/Gradient_Textures/Defenseless_Elsie
/usr/share/afterstep/backgrounds/Gradient_Textures/Defenseless_Elsie.mini
/usr/share/afterstep/backgrounds/Gradient_Textures/Dorchester_Consolidated
/usr/share/afterstep/backgrounds/Gradient_Textures/Dorchester_Consolidated.mini
/usr/share/afterstep/backgrounds/Gradient_Textures/Drop_Injures
/usr/share/afterstep/backgrounds/Gradient_Textures/Drop_Injures.mini
/usr/share/afterstep/backgrounds/Gradient_Textures/Evil_Car_Wash
/usr/share/afterstep/backgrounds/Gradient_Textures/Evil_Car_Wash.mini
/usr/share/afterstep/backgrounds/Gradient_Textures/Libelous_Paintings
/usr/share/afterstep/backgrounds/Gradient_Textures/Libelous_Paintings.mini
/usr/share/afterstep/backgrounds/Gradient_Textures/Nordic_Powder_Pirate
/usr/share/afterstep/backgrounds/Gradient_Textures/Nordic_Powder_Pirate.mini
/usr/share/afterstep/backgrounds/Gradient_Textures/Psychiatrists_Imminently
/usr/share/afterstep/backgrounds/Gradient_Textures/Psychiatrists_Imminently.mini
/usr/share/afterstep/backgrounds/Gradient_Textures/Simple_Texture
/usr/share/afterstep/backgrounds/Gradient_Textures/Simple_Texture.mini