I am new to Houdini (just started like two weeks ago) but I am already blown away by the possibilities of this soft. I started to wonder why I was using MAYA for all those years Anyway, currently I am going through plenty of tutorials playing with particles, destruction, etc. etc. I would like to use RAMP to set up the size of the particles depending on their AGE because so far I am using the expression fit01(rand($AGE),0.01, 0.1) which scales particles but scales each one of them per frame and what I need is for the particles to be small at the begining, then grow in size and then get smaller towards the end of their life. Please forgive me a noob question
Here is one way. If you drop down a Color node it has the ability to map an attribute, such as particle age, to a ramp. This gives you a greyscale based upon particle age but remapped by the ramp. Then you follow that up with a short one-line wrangle that takes the RED channel from the color and assigns it to the @pscale (particle scale) attribute. Follow that up with a Copy (which internally recognizes the @pscale attribute) and you get something like what you are asking for.
This kind of emulates the Trapcode Particular approach to particles.
Awesome hint - thanks a milion There are so many ways to solve a problem in Houdini - it is just amazing. Thank you for your help - I am gonna test it tomorrow.
