2D Modifier - Use image feedback to convert movement to rgb colorsUse a frame delay to color the difference and so generate some kind of real time vector map. Better to put the iteration parameter to its maximum for a better effect. Very effective as a vector field map inside a Normal Map Layer set over a particle system.
Here is a video tutorial to help you figure how to use it :
Watch directly on youtube
- Num Iterations Number of iterations from detailled to broad (the more the better your normals will display big movements)
PARAMETERS COMMON TO ALL FRAME DELAY BASED MODIFIERS
- Rasterize Quality Rasterize quality of the optical flow