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Forum: Geometry
Re: Question Problem with G4UnionSolid (Emanuele Leonardi)
Date: 28 Feb, 2017
From: John Allison <John Allison>

This is a vis problem. Tracking should be OK.

But it is not clear to me why you need to do this? Tracking should be OK even with a succession of adjacent boxes and trapezoids.

There is an "experimental" class, G4MultiUnion, which is available if you build with GEANT4_USE_USOLIDS - see Installation Guide and Section "Unified Solids" of the Application Developers Guide.

Alternatively just try shrinking the volumes a tiny amount, 1 nm or um, although that might slow down tracking a little.

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