Asymptote is a powerful descriptive 2D and 3D vector graphics language for technical drawing, inspired by MetaPost but with an improved C++-like syntax. It provides for figures the same high-quality level of typesetting that LaTeX does for scientific text. Asymptote is a programming language as opposed to just a graphics program. It can exploit the best features of script (command-driven) and graphical user interface (GUI) methods. High-level graphics commands are implemented in the language itself, allowing them to be easily tailored to specific applications.Release Notes: Billboard interaction is now disabled for offscreen rendering. A markthin marker with opacity thinning has been implemented. The copy, map, and sequence functions have been generalized to arbitrary depths. Asymptote can now be compiled as a shared library. A tuple operator has been added. The draw(revolution) function now defers drawing until the final camera position is known. Nonrendered preview images can now be generated for fitted pictures. Jacobi elliptic functions have been implemented. A quick reference card has been added. Compilation and static initialization issues under Mac OS X Lion have been addressed.