For my pinhole work I keep two films in stock. Fuji Acros and Foampan 100. They have very different “Schwarzschild effect” a term I much prefer to "reciprocity failure". There is no "Failure" it is just a different aspect of the film that can be exploited to great advantage. I use the films differences in this area to get what I need.

For example I can take photo inside a crowed building and have no people show up in my final photo if I use Foma film with this "Failure".