The document discusses mesh texturing in Blender, an open source 3D modeling software. It covers the basic interface, how to add textures to 3D models by mapping 2D images to the model's geometry, and how to export the textured 3D model as an OBJ file. The steps include selecting edges to mark seams, unwrapping the UV layout, adding a material and image texture in the node editor, and exporting the final textured 3D model.