Paul Gessinger

Right, that's a very good observation. We actually had some [discussion](https://github.com/acts-project/acts/issues/1484) a while ago on whether interpolation should automatically, or if explicitly configured to, to fall back to a default...

Added @Alonl14 to the CI perms group.

Are these printouts from the FPE monitoring, or are this crashes?

Right, ok. We've seen this in some cases, indeed, that the RNG has problems with the inputs we give it. I don't there was a conclusive answer to whether this...

Getting the split factor to work when the material is on another physical surface would be fairly difficult. I suppose the most robust way to do it would indeed be...

Just want to add that in curvilinear the plane rotation around the normal is also fixed.

Draft for now, to gather feedback before potentially adding the other workflows. What do you think @andiwand @benjaminhuth ?

@andiwand Ultimately, I don't think it matters from a technical standpoint, only from an organizational one.

Honestly, I really think the simplest thing to do is just have the CKF always use the transient backends, since it explicitly copies out the track states we intend to...

I guess mentioning that it's the absolute error would be a good idea (although that's what I personally assumed to be the case). Apart from that, if my understanding that...