"An Area-Preserving Parametrization for Spherical Rectangles" EGSR2013.

• https://www.solidangle.com/research/egsr2013_spherical_rectangle.pdf

Reference

• fxguide "The State of Rendering & Part 2" Arnold. MIS
  • http://www.fxguide.com/featured/the-state-of-rendering-part-2/
• Solid Angle research
  • http://www.solidangle.com/arnold/research/