- open your file
- increase the value on the right side of the warp slider
- it works for me
- be sure Displacement --> Magnitude has values (has different colors)
OS: Debian GNU/Linux 9.5 (stretch)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.14266 (Git)
Build type: Debug
Branch: master
Hash: 2e1a887c4c59fd1f3627eec9f3977c9b86fa523d
Python version: 2.7.13
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.0.0
Locale: German/Switzerland (de_CH)