Windows 10 - NVIDIA GeForce 8600 GT
Broken: (example: 2.78b 3c04373
Short description of error
Unable to add Texture to an imported STL file
Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps
Following the procedures outlined in 3 Tutorials and 2 manuals the operation stops at the point of UNWRAPPING the object.
When you press "U" the option for UNWRAPPING does not appear, is greyed out, or the menu does not appear at all.
Have not been able to identify any rhyme or reason behind the above actions, sometimes it does other times it doesn't.
Manually attempting to select vertices selects the entire object.
At time it appears to be working normally when using CYCLES RENDERING, however no texture is appearing on a saved of exported file.
Suspect that the imported object is not a MESH object