Do any comic creation apps offer pre-made assets, templates, or 3D models to aid in drawing?

Yes, many modern comic apps integrate or support pre-made assets to speed up the creation process. Clip Studio Paint is renowned for its vast Clip Studio ASSETS store, where users can download countless free and paid brushes, patterns, 3D models (for posing characters or setting up scenes), backgrounds, and speech bubble styles. Medibang Paint also offers a library of free screentones, backgrounds, and brushes. Apps like Comic Life provide numerous panel templates and pre-designed speech bubble and caption styles, allowing users to quickly assemble pages without drawing every element from scratch.