XPS 15 9560 - Win 10 (latest) - GTX 1050 (latest driver)
Broken: 2.79.0 9b32248
Short description of error
The ZIP contains two identical scenes. One is packed und Cycles will render a wrong texture mapping result.
Exact steps for others to reproduce the error
Load unpacked scene with linked textures. Correct rendering.
Pack scene with realtive paths. Wrong rendering.
Scene with Textures: