Additional information regarding the topic "Envelope in example B1"

Some years ago I read that a envelope (like the one in example B1) is included to do “Fast simulation” and also to do parameterizations, Is this true?; What does it mean “Fast simulation”?; What does it mean parameterizations?

_Geant4 Version:_11.2.1
_Operating System:_Windows 10
_Compiler/Version:_Visual Studio 2022
_CMake Version:_3.29.0-rc2

I think you’re all overthinking this. It just a simple example, about as simple as it can be.

If I recall, the geometry is a simplistic human body. The “Envelope” is the body and the shapes are two internal organs. In particular, it demonstrates geometry hierarchy - the organs are represented by daughters of the “Envelope”, and as such their material displaces the material of the Envelope.


Ok Doctor, thank you very much for the information. It has been a great help

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