Hundreds.

Ontario, Canada-based photographer Matt Molloy recently created a gorgeous series of sky images by stacking multiple photos onto one. The individual photos are most often taken from the timelapses he shoots. The final photo has a stunning painterly effect, almost as if someone had taken a paintbrush to the sky and smeared its beautiful colors.

When asked at 500px how many photos it took to create the one seen above, he replied, “I’m not exactly sure, but I used hundreds of photos to create this one image.