What’s in flat.mat?
Curvature map from mrGray – used to make flat anatomy
3d locations of gray nodes
2d locations of flattened gray nodes
Everything that was printed in the status window during the unfold
Useful unfold params:
infoStr =
    startTime: '20-Feb-2001 11:38:42'
      endTime: '20-Feb-2001 11:44:51'
    perimType: 1
     meshFile: [1x56 char]
     grayFile: [1x56 char]