Images missing faces in the retro tileset:
./connect/Gates/spikes.110
./system/blocked_darkblue.111
./system/blocked_olive.111
./system/blocked_green.111
./system/event_apply.111
./system/event_drop.111
./system/event_pickup.111
./system/event_say.111
./system/blocked_blue.111
./system/blocked_lightgray.111
./system/quests/quest_lake_country_undead_catacomb.111
./system/quests/quest_scorn_CoffeeGoose.111
./system/blocked_white.111
./system/blocked_magenta.111
./system/blocked_lime.111
./system/blocked_darkmagenta.111
./system/event_death.111
./system/blocked_teal.111
./system/blocked_maroon.111
./system/duplicator.111
./system/blocked_yellow.111
./system/event_timer.111
./system/blocked_red.111
./system/event_trigger.111
./system/event_time.111
./player/class/Warrior/Dwarf/mountain_dwarf.131
./player/class/Warrior/Dwarf/mountain_dwarf.111
./player/class/Warrior/Dwarf/mountain_dwarf.132
./player/class/Warrior/Dwarf/mountain_dwarf.171
./player/class/Warrior/Dwarf/mountain_dwarf.151
./player/class/Warrior/Dwarf/mountain_dwarf.172
./player/class/Warrior/Dwarf/mountain_dwarf.152
./player/class/Warrior/Dwarf/mountain_dwarf.112

Images that are not matching with base set:
NONE

Many faces for more recent objects are just scaled-down copies of the base face.
These could be re-done to be more retro-like (e.g. limited palette, front perspective, etc.)