Clipp reality Mesh

Hello, 

I have a problem with clipping 3SM file. I would like to clipp 3SM file to my corridor.

Using 'Clip Reality Mesh' I see this information 'Reality Mesh with georeferencing information is anchored to geolocation'. When I use 'Mask Reality mesh'  it doesn't mask, but all ortofotomap disappear. 

 Thank you for help

Oliwia