Glints are a simple (if cliched) way to add interest to an image, along with lens-flare effects, sparkles and highlights. Here we'll define a new brush to add glints to the metallic object created in the previous section.
- At the size used here and below, the anti-aliasing done when you import the drawing gives a softish edge to the star, but if you make any larger ones apply a small (1-2 pixels) gaussian blur before sampling it.
- I've made a file with a selection of different-sized glint brushes, which you can get from the downloads page.
- If you want proper glints and lens flares you should look at the Persistence of Vision ray tracer (version 3.10g has been ported to RISC OS by Jérôme Mathevet, and I believe someone else is working on a more recent version). Various people have written programs for it which accurately simulate the effect. Cerilica's Insignia effects program will also add simple lens flares.