This image shows two aircraft of the Frecce Tricolori, the aerobatic display team of the Aeronautica Militare, climbing through the clouds and seen from the cockpit of the formation leader. The "three-colored arrows" were formed in 1961, the Aermacchi MB-339-A/PAN type aircraft are flown by the team since 1981.
Technical Details
Rendered in Cycles (Blender 2.66/2.67) up to between 3200 and 9600 samples per pixel, depending on how much sampling different areas of the image needed to be noise-free.
Compositing was done in Blender with additional grading in Lightroom 3, masks for compositing were created with the traditional Blender render engine and Gimp.
Aircraft textures were created in Inkscape, some additional textures, including the backdrop, are from cgtextures.com.