>>4227093I know nothing of washi film, but shooting IR film comes with a different way of meter and exposing. I know when I used to shoot Kodak HIE this was the case. Given your image looks like a cloudy day, there wouldn't have been as much IR light as there would have been during a sunny day. Your meter may think the clouds need an extra stop, but in IR terms you may have needed 3+ more stops (since camera meters aren't tuned for IR).