1. Go to File Options Render Settings.
2. In the Randomise Textures section, you can enable or disable this function with the check box on or
off.
The Default is to have Randomise Textures enabled.
Design without randomise textures enabled:
Note: the grain on doors is replicated where the Randomise Textures is inactive, whereas the grain is more realistic and non-repetitive when the Randomise Textures is active.
Design with randomise textures enabled: