Hair: Parent - Child distance

When setting up a hair particle system with children, how can I control the distance the children sprout from the parent?

If you set children to Interpolate, the distance depends on Density, basically they are uniformly distributed among the basic hair strands; if you set them to Simple, they spread around each strand into an area defined by the Radius parameter. In the latter case to have a uniform distribution you have to adjust the Radius to the average distance between the strands, which is due to their number, and eventually to the vertex group or/and texture controlling the density.


Thanks. I only used interpolated so far. Comming to think of it, where would the interpolated section be usefull?