adresd has just released a Spherical Harmonics Demo/Sample for the PSP. Here’s what he had to say about it:
“Spherical harmonics, just calculated on main cpu, all drawing via sceGu. Mainly to demonstrate diff rendermodes, includes wireframe, solid, lit,textured and envmapped. Is also comitted as a sample within PSPSDK for those grabbing from svn. It does go through some random values, just interpolating, so can get a bit crazy at times. Just bear with it :)”
Left/Right – change rendermode
Up – first mode
Down – last mode
You can get it in our PSP Download section [here].