Turbulize particle velocity -- some particles get stuck

[adrencg]

I've noticed that every time I use that node, there's always groups of particles that hang in the air, while other do their thing and move around correctly. Does anyone know why this happens?

[Tekano]

yes its a known problem with strong turbulance that particles get stuck in 'valleys' (not just in XSI ) try curl noise instead, whilst a bit more setup I do believe that is what it was designed for and you will not get particles 'stuck' unless there is some other logic in your tree making them 'stick' in the air

[Pooby]

One thing that has confused me about the turbulise node, in the past, is that the values range from -1 to 1 rather than 0 to 1 as I'd assumed, causing some strange behaviour.

I'm not saying this is the reason behind your problem but its worth bearing in mind anyway.

[adrencg]

yes its a known problem with strong turbulance that particles get stuck in 'valleys' (not just in XSI ) try curl noise instead, whilst a bit more setup I do believe that is what it was designed for and you will not get particles 'stuck' unless there is some other logic in your tree making them 'stick' in the air

I like Curl Noise, but when I use modulate by noise to activate the effect, it will only occur inside the area of the null.