Assign complex crystal orientations

[Ming-is]

The microstructure is represented by a 1000-grain 3-D Voronoi tessellation.
I want to assign custom crystal orientation to about 100 grains in the center and random orientation to the rest. The composition of custom orientation is: "0.3fiber(1,0,0,0,0,1)+0.2fiber(1,1,0,0,0,1)+0.5*fiber(1,1,1,0,0,1)"

How can I achieve it?

[rquey]

This requires a few steps:

1/ Generate the custom orientation distribution for whatever many grains you need.
2/ Generate a random orientation distribution for the rest.
3/ Generate the tessellation and output the grain properties, e.g. x, y, z, to identify which grains are central (to be assigned the custom orientations).
4/ Based on the grain properties, write an orientation file that contains the list of grain orientations.
5/ Generate again the tessellation and assign it the desired orientations using -ori file().