Optical surface direction problem

[woolaman]

Dear GATE users, I suspect that the optical surface definition is incorrect in the GATE documentation sample code: /gate/Volume2/surfaces/name Surface-From-Volume1-To-Volume2 /gate/Volume2/surfaces/insert Volume1 /gate/Volume2/surfaces/Surface-From-Volume1-To-Volume2/SetSurface Surface_name

In my code, I set:

I can see many lights are reflected in the light guide volume(left part), and a small number of lights transmit to the SiPM volume(right part).

when I modify the code as below, then no lights are reflected.

So I think that the sample code is setting the surface from volume2 to volume1, not volume1-->volume2. /gate/Volume2/surfaces/name Surface-From-Volume1-To-Volume2 /gate/Volume2/surfaces/insert Volume1 /gate/Volume2/surfaces/Surface-From-Volume1-To-Volume2/SetSurface Surface_name

If I'm right, please revise the GATE documentation.

[thilomasbaum]

I second this, after making some trials myself!