To texture a sprites 3D model, start by UV unwrapping the model (mapping its 3D surface to a 2D plane) and then assign a sprite sheet (organized 2D textures) to the model’s material in your 3D software or game engine.
UV unwrapping is critical—it defines how each sprite on the sheet aligns with the model (e.g., a character’s leg sprite matches the unwrapped leg UVs). In tools like Blender (modeling) or Unity (games), import the sprite sheet, link it to the material’s texture slot, and tweak UV positions if sprites look stretched or misaligned.
For new users, practice with simple models (like a cube) and free sprite sheets—most tools offer step-by-step tutorials for basic setup to get you going quickly.