  We are concerned with the modification of liquid crystalline and polar order
in SmC* liquids by illumination. In particular we show that non-uniformity due
to absorption and also dynamics, can be complex. The variation of polarization
with temperature, while illuminated, is modified from that assuming uniformity.
Apparent changes of polarization with illumination will be shown to be
underestimated due to non-uniformity. The dynamics is shown to depend on
propagating fronts of photo-conversion penetrating the sample.
