Peder Mønsted, A Winter's Day |
The effect comes from light scattered by water vapor and dust in the air between you and the sun. The light is further scattered by your eyelashes when you squint, and then by the aqueous humor and vitreous fluid of the eye. The effect is best observed when you glimpse a setting sun through trees or when you see a streetlight at night.
Try squinting hard at a streetlight and tilting your head to see how the rays tilt with you. Also, try walking through the forest where the sun is mostly blocked by branches and glance up toward the sun as you walk to see how the corona comes and goes.
Giuseppe Pellizza (Italian, 1868-1907) Volpedo, The Sun, 1904 |
Lens flare is easy for digital artists to add, and a little harder for physical painters, depending on the technique. As a photographic effect, it has origins in camera optics. Its artistic use—and overuse—in film, television, and photography is well explained in this Vox video (link to YouTube). Thanks, Dan.
--------
Related GurneyJourney posts:
Color Corona
How to Get a Feeling of Misty Light
Practical Lights
Light Spill
More of this kind of stuff in my book Color and Light: A Guide for the Realist Painter
5 comments:
AFAIK, the "rays" of a point light source like a star are the result of refraction in the lens, not the vitreous fluid or cornea. The lens is composed from sectors, and normally the difference in refraction is too minute to notice, but a point light source brings the boundaries between the sectors out.
Eugene, what a cool piece of information. Thanks for that.
Lens Flares have become cliché in the demo reels and portfolios of computer game artists. Most art programs can handle them with a key click. The PC can do all sorts of technical light effect. I actually had a student tell me the reason he used it so much was because it was an effect that a painter couldn't do on their own. I insisted, with good observation skills and some experimenting, he could get these effects with out a computer. I'll have to show him these examples. Thank you so much, James.
Maurine
That flare is such a great effect but so easy to overuse. I always think of long tree shadows backlit with a bit of sun glaring. It's how we see it. But night scenes in cities look great with the lens flare effect adding to the action of the scene and that's not how we really see it at all.
Just so easy to overdo it.
Happy to help, James. :)
Post a Comment