Another projection mapping, this one draws some neon lines.

The projection mapping part is same as that described in Receding Rectangles.

In this program, the neon lines' glow characteristics, such as how large the halo areas are, and their gradation can be fine tuned with GUI sliders. The line feathers fade more smoothly and the neon lines actually look more like real than what was shown in the video.

The video has no sound or music background, which I think is better this way.