C4D Particle Syste, Scale over normalized life multiplied by Noise

[stock-foundation]

Hello,

I'm trying the new C4D 2025 particle system for the first time. I would like my particles radius to follow a curve mapping based on their normalized age, but on top of this, I would like the radius to also be affected by a random noise.
So far I have only been able to do one or the other, but not both.
I tried:

• using 2x Data Mappers, one set to property with curve remap, second using fields with random field, but either way one of the mappers seems to be overridden?
• using 1x Data Mapper, using Source: Property with Noise ticked, noise seems to override the life percentage mapping.

I want to modulate the size of the particle so it starts 0 radius, ends at 0 radius, but while its alive and radius is above 0, that value should be multiplied by noise.

Thank you,
Nik

p.s. I was unable to post in the correct category, im not sure why this is showing in site issues, Im also not sure why my account is labled stock-foundation, i dont have control over my company cineversity account setup so im not sure what the issue with naming/permissions might be?

• edit, just realised using property + age percentage controlling Radius and Noise Enabled ticked does modify after scaling to get the behaviour I was after

[noseman]

The solution you found is the simplest one, but there's more ways to do it depending on your requirements.
Here's an example of using the Data Mapper for the main Curve and then a Math that takes the Radius and multiplies it with a Random number with controls for the frequency (Animation Speed) etc.

https://www.dropbox.com/scl/fi/jnfcg6yuoya9kogu4w5x8/Radius-Curve-Random-01A.c4d?rlkey=rvstd3lx7377cg9tc3y2i04bf&dl=0

[stock-foundation]

@noseman this is awesome thanks for sharing!