Hi,

I am trying to make the areas of the sphere where the particles come into contact start to seemingly grow or swell outwards.

Any ideas on how I can proceed? I tried using the collision data in the point vop but didnt really get anywhere…

Thanks

Take a look at attribute transfer. Particles have an attribute called @hitnum which increments when a collision is detected. Make the sphere a collision object then transfer the @hitnum attribute to the sphere, along with the particles @P position when the collision occurs and the time it occurs. These three new attributes become attributes on the sphere through the transfer process.. Then your sphere geometry could handle what to do with that information. For instance read the time since the collision and set growth based upon the difference.

Just brainstorming, it sound like an interesting project.