Import 3d geometry from x,y,z data matrix

For my simulations I am trying to import a 3D geometry which I calculated in Matlab to Comsol.
For my 2D simulations I used a interpolation curve with the datapoints from a csv file.
For my 3D simulation I have x, y and z coordinates. Does anybody knows how I can make a 3D geometry out of these in Comsol?
I use Comsol Destop and LiveLink with Matlab.

Thanks in advance
Kelly Hesselink