User Guide > Rendering and Render Setup > Shading > Shading menus > Rendering menu
set > Texturing >
Texturing > Delete
Texture Reference Object
Deletes the texture reference object for the selected surface if one exists. To select a reference object for a selected surface to delete it, either use Texturing > Select Texture Reference Object (see next), or click the reference object’s heading in the Channel Box.
See also Create Texture Reference Object.