Radiant is an advanced lens flare
renderer for Project Dogwaffle that complements the internal (quick and
easy) nova and lens flare tools. Lens flares are glows and reflections
that occur inside the lens
assembly of a traditional camera. The irony is that real photographers
try to avoid them, while CGI artists pride themselves of showing how
cool they look, because they come this much closer to the "real" thing.
Most camera manufaturers will tell you that they have
worked to get rid of them - but they're actually sort of pretty.
Radiant allows extensive control over every element of an effect, and
results can be rendered out to a series of frames (such as for an
animation in which a bright flare is moving).
A single-frame lens flare is usually rendered and then passed on to
Dogwaffle by way of the brush. It is loaded as a custom brush and thus
can be used to paint single or multiple "impressions" of the flare
image. A typical way to use this brush at that time is to change the
draw mode from Default to Additive, and to reduce the intensity or
impact of the flares by reducing the opacity of the brush effect.