In this sketch, I explore different types of particles. In this project, I used the GLSL node in touch designer to simulate particles. I used an image input to drive the particles, which are basically just points plotted along a grid. Using noise I was able to create the animated look. Putting in keyboard input gives the illusion that it is being drawn.
Image file input with resolution adjustment.
GlSL node with noise effect.
SOP point nodes to drive the grid-like structure. Render Output set up and final color adjustments.