Uses the PVR2 hardware fog table. Care must be taken when changing
fog values because there is only one fog table and any changes made
while the PVR is rendering a scene may result in display artifacts.
Most noteably if the changes made are large. When vertex fog is implemented
this will not be an issue, however vertex fog will take more CPU time.
| Parameter name | parameter | default |
| GL_FOG_MODE | GL_EXP, GL_EXP2, GL_LINEAR | GL_EXP |
| GL_FOG_DENSITY | density >= 0.0 | 1.0 |
| GL_FOG_COLOR | float [4] color = {R, G, B, A} | {0.5, 0.5, 0.5, 1.0} |
| GL_FOG_INDEX | Palletted modes not supported | |
| GL_FOG_START | 0.0 - 259.0 | 0.0 |
| GL_FOG_END | 0.0 - 259.0 | 1.0 |
glFogfv(GL_FOG_COLOR, fogcolor);