Photoshop can be used for story boards, however those are typically done by hand.
Mostly, Photoshop is used to create concepts, or concept art to be handed off to the 3D modellers, maybe floorplans if they’re needed. It can be used to create Character Sheets, or other blueprints for objects to be used for 3D modeling.
The biggest use of photoshop in the animation industry is to create textures for 3D models
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