Pop-out Clocks Wiki & Guide
wiki.9minecraft.net/pop-out-clocks-9minecraft-resource-pack/
How Pop-out Clocks replaces the flat clock sprite in an item frame with a raised 3D wall clock, why only the framed clock changes, and how it behaves with other packs.
Overview
Put a clock in an item frame in vanilla Minecraft and you get a flat sprite pressed against the wall - the same picture that sits in your hotbar, just larger.
Pop-out Clocks replaces that one case with a real three-dimensional model: a clock case with a rim that stands out from the frame, the way a wall clock actually hangs. The dial still runs off the world time, so the hand sweeps round through the day and the face darkens at night, exactly like the clock in your hand.