The image is 3 exposures one stop apart for the actual building, plus another exposure for the sky that was merged in using Photoshop.
Additional processing included some dodge and burn, smart sharpening in Photoshop and contrast enhancement and cross processing in Color Efex Pro 4. Finally, the image was desaturated by blending it with a black and white layer at 65%. Final curves and clarity adjustments in Lightroom 3 to finish it all off.
Want to learn about some of the most interesting locations to shoot Architecture in Toronto, including this one? Check out my Toronto architecture photo tour blog post
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Thanks for looking!