Hello,

I have just started exploring pop vops in Houdini. I have been following a few tuts and now i am stuck. Basically its a particle flow over a surface. I am stuck at a point where the particles fall from space & just travel through the SDF i created once they reach the field. I am unable to get the vector that changes the particle velocity and makes it travel over the surface.
If any one can go through the file and let me know, it would be a great help!

Thanks & cheers!