Ignoring entities
When all provided features fail on some geometry or prefab placement pattern there's an authoring component that will help out called TPC_Ignore Tag_Authoring. Add this to any geometry with a collider and TPC will ignore it in any raycasts.
This should be a last resort of course and for the demo scene this tag is only used in the TPC_ShooterDemoScene on the small cylinders. Usually those cylinders are caught by the thickness check but the system that checks for an obscured camera offset vector has trouble with it and wants to switch sides when such a cylinder is in the way. This results in unwanted behaviour and will possibly be addressed in a future release.
For the time being, adding the tag is the fastest way to solve this problem.
Also keep in mind that the tag can be directly put onto a prefab!