Thanks a lot. I had experimented with fitting pdb structures and calculating their transformation with the match move false showMatrix true command, which slightly differ than measure rotation, I wonder why. 

On Mon, Dec 21, 2020, 9:13 AM Elaine Meng <meng@cgl.ucsf.edu> wrote:
Hi Ahmad,
You can report in the Reply Log the transformation of a model relative to another model with "measure rotation"
<https://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/measure.html#rotation>

Also, you can save the current overall transformation of models (including any rotations/translations of the whole scene) to a text file with command "matrixget"
<https://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/matrixset.html>

I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Dec 18, 2020, at 10:09 PM, Ahmad Khalifa <underoath006@gmail.com> wrote:
>
> Hello,
>
> When I fit two maps into each other, I get the transformation matrix in the reply log, but what if the moving map doesn't converge by fitmap and require some initial manual alignment, how can I calculate the transformation matrix for that?
>
> Best regards.