LDraw file generation

[Ed Bardet]

I still need help as some of the previous answers are not borne out by experiment. 
I, in Stud.io, made a small 4 tier wall (starting wall.png), turned the second brick on the bottom row, which turned the rest of the wall (10 degree wall.png).
I then exported both the original and turned wall in ldraw format, and reviewed the files.
I noticed that the Z coordinate of the second round brick on the second row did not change. The Z coordinate of the second 1x2 brick did change. So the brick was turned.

The question is. Several posts have said that the rotation takes place from the center of the brick. If this is the case the round brick connected to it should have moved. If the round brick does not move, the center of rotation must be at the center of the selected stud on the 1x2 brick, not it's geometric center.

I am beginning to think that the procedure for Stud.io is different than that of the LDraw community.

Anybody want to jump in?

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