This is a combination of two images, obviously, done in Photoshop CS3. Both shot in color with DSLR. The grayish one was during rain / snowfall on Glendora Mountain Road in Glendora, Calif. Temperature dropped to 34 during strong rain and there was softly falling snow alternating with the rain. Other shot is from fireworks show at the Claremont Colleges in Claremont, Calif., in 2012. Gray shot -- 1600 ISO, 18-135mm lens. Same lens for fireworks shot.