[Chimera-users] color pdb based on rmsd

Hi Chimera-users, I have aligned three pdbs using MatchMaker and would like to color one based on rmsd (per residue or per CA atoms). I see that i can use 'rmsd' to calculate CA-CA distance between two models, but i would like to write the distance difference in a file so that the file can be read in 'attribute' coloring scheme. Please let me know how to do this. thanking you with kind regards Mani.