Maths problem.. weighting points by proximity to tester

[Pooby]

Yes, thanks very much it works well. Very grateful for you taking the time to help.
l noticed the blending is nicer if you do what the calculate weights node does, and square the distances twice before inverting and normalising.

[grahamef]

Yes, you can use any power you want (as long as it's positive), or even a different function for the falloff as Daniel mentioned.

[rray]

did someone find a good solution for interpolating a value on a 2D plane?

The solutions in this thread are all giving me either this kind of result:



or something that's not smooth enough.

A solution like this (photoshop) would help, where there is no more influence of green "behind" the red dot



of course for any number of dots
Cheers,
-rr