To process a texture 3D model, you typically adjust UV unwrapping (for texture alignment), edit texture maps (e.g., color, normal), and apply/preview textures using 3D software.
UV unwrapping converts the model’s 3D surface into a 2D layout so textures don’t stretch or distort. Texture maps add visual details—edit them in tools like Photoshop or Substance Painter. Applying textures in Blender or Maya lets you check how they look and tweak as needed.
For new users, free software like Blender (with built-in UV and texture tools) is great to practice basic steps without cost.