Preparing geometry

[MikelBG]

Finally I got a solution for this "preparing geometry" delay. In my case it was a corona decal, that had objects excluded, instead of objects included, I hope this works for somebody.

[TomG]

Any chance of a copy of that scene? Via ticket is fine for privacy, https://support.chaos.com/requests/new

Failing that, can we have a fairly detailed description of what was going on? Did the Decal overlap 10s or 100s of objects, and it was accidentally excluding the two it should apply to and so was being calculated for 10s or 100s of objects? And on reversing that, so including those two, it was only being applied to two? What happens with no include / exclude where it just applies to all objects it overlaps, is that fast or slow?

Thanks!
   Tom