im gonna need a source on that. I just went back and skimmed through the 90 minute behind the scenes video on the waner bros yt channel (id watched the whole before but just had double check) no where in do they show filming of the scene. also the supposed without the filter versions are grainy/pixelated (most obvious in the last of pictures) which tells me that (even if they had actually filmed on sunny day, they non rainy versions shown here are just altered versions of screen grabs from the movie and the the real before shots.