Spencer Magnusson's popular Light Painter add-on is really quite amazing: it lets you interactively add lights and shadows to your scenes. Draw where you want the light to affect, and Light Painter adds and places the light for you.
Given its popularity, Spencer decided to share a little history of the add-on, as well as share some nerdy details.
You can download the add-on here (it's free!), and if you want to contribute to it, have a look on its Blender Projects page.
2 Comments
Second link is broken (Two URLs in one)
Correct link to project page should be:
https://projects.blender.org/SMagnusson/light-painter
Thanks, I'll get that fixed!