Hi, Robert Thanx for your quick reply, Is there any way to calculate memory usage of my custom particle system class? If I query this->smoke_right.valid() it returns false, when i remove children but As far as you've seen I don't have destructor on my node and I suspect that internal geode and particle system doesn't free from memory. Maybe It's better in this situation not to use ref_ptr? Or maybe create particle system in the beginning and attach already made every time but in this way I have to clean all particle system variables. Thank you! Cheers, Roman
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