I'm wondering what might be going on here with the grain. The film is Tri-X, developer is Ilford Perceptol, I'm guessing the temperature was about 75ºF. plain water stop bath, old-ish jug of Photographer's Formulary TF4 fixer. Constant agitation in BTZS tubes for about 8 minutes. It's not a huge bummer, (although it would be a real interesting challenge to try and get rid of it!) I've just never seen this particular grain effect before and was curious about what might have caused it. Maybe it's really common and I'm just a newb. Entirely possible. Anyway, thanks!