Flowmap

A flowmap used in conjunction with the UVs of a mesh, is 2-dimensional velocity data.

The Red channel describes the U or X direction for each texel (texture pixel), while values from 0 to 127 describe velocities facing left (0 = fastest, 127 = slowest). Higher values describe velocities facing right (128 = slowest, 255 = fastest).

The Green channel does the same for up and down.