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bloodhawk posted a topic in EffectsHey guys, Kinda Intermediate at Houdini and a recent full time convert from the 3DSMAX/TP world. I have been working on a tool, where the user can easily plug-in curves and generate art direct able particle flow along the input curves. Its about 90% done, and it works great with curves that are not too close to each other or don't intersect each other at too many points. How ever in certain scenarios. like multiple inward spiral curves intersecting each other, since the POPVOP system is based on Particle Cloud Search : - PC Open to look for particles close to the curve points. - Use those points and push them along the length of the curve using the curve tangents. , the particles get attracted towards either curve based on the search radius and no. of search points. This is definitely understandable, on why its happening. But is there any way to lock/tie the particles to specific curves only? The Radius and No. of Points parameters give it a lot of control for most scenarios, but the one mentioned above. Obviously there are a lot more parameters that i have added for dictating the flow behaviour. But the main solution that i can think of is to have the “found” particle only follow the curve and be affected by the parameters along that curve ONLY. Maybe have a POPVOP decide groups for the curves/particles? TLDR; Need to make the particles only flow along the curve it chooses/gets attracted to at the beginning. I have never worked with groups in POPNET, so im pretty much lost. Unfortunately because of my limited knowledge at Houdini i haven't been able to figure out how to achieve this. Would really appreciate some help on this.