media-gfx/tachyon
A portable, high performance parallel ray tracing system
USE Flags
doc
Global: Adds extra documentation (API, Javadoc, etc)
examples
Global: Install examples, usually source code
jpeg
Global: Adds JPEG image support
mpi
Global: Adds MPI (Message Passing Interface) layer to the apps that support it
+opengl
* This flag is undocumented *
openmp
Global: Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp"
png
Global: Adds support for libpng (PNG images)
threads
Global: Adds threads support for various packages. Usually pthreads