UV maps 3D models link 2D images to 3D surfaces using UV texture coordinates, while image-based 3D models are built from multiple 2D photos (via photogrammetry) without pre-set UVs.
UV-mapped models let you precisely align custom textures (like adding a logo to a 3D cup), while image-based models capture real-world details (like a tree’s bark) directly from photos for natural realism.
Use UV mapping for custom-textured assets; use image-based tools (e.g., Meshroom) to scan real objects for accessible, lifelike 3D models.