Robert Alan Byer <bye### [at] mailourserversnet> wrote...
> Colour[TRANSM] *= C1[TRANSM];
The filter and transmit channels of Colour do not get initialized during
photon tracing. To correct this, add the following lines before the call to
Trace() in ShootPhotonsAtObject in photons.c:
PhotonColour[3] = 0.0;
PhotonColour[4] = 0.0;
-Nathan