by Chuck Desylva
I have made a special 3D engine that use only the CPU and I have a performance issue (below 10 fps for min graphics element required).
by Jeff Andrews
I am casting a large number of rays from a compact ray-casting source into a static geometry scene. This is not for rendering. The geometry may have a very large # of triangles.
Particle systems are an ideal candidate for multi-threading in games. Most games have particle systems and their general nature of independent entities lends well to parallelism.