I have a folder saved under:
In the "Active Layers" folder there our two folders; one called "Geotiffs" and the other "Virtual Raster".
In QGIS 2.18.20 I created a virtual raster with the .tif files contained in the "Geotiffs" folder and saved the virtual raster in my "Virtual Raster" folder. I created pyramids using the internal if possible option which created a .ovr file alongside my .vrt file. Everthing worked as expected.
Now if I move the "Active Layers" folder onto someone else's computer and save it in the exact same file path the pyramids don't work properly causing the virtual raster to disappear when I zoom in so far.
What have I done wrong and is there a way around it?