I'd like to grab the z position in trapcode particular, of a particle and then use that infomation to apply a value to the color attribute. The reason is to create a zdepth pass that will all me to use anamorphic iris shapes.
AE camera options has iris shape but as it sees particular as a 2d footage it does not allow iris shape/diffraction. ( although it does blur correctly.
Ideas would be most helpful
No it doesn't. Particular has built in 'Depth of field' If that's what you mean. That is based on AE Camera Settings. And as I said above AE Camera opions does not allow custom lens shapes without true depth in the scene. If you mean Particular can take a depthmap as an Input, that is true. But useless in this instance. Anamorphic iris shape is what I want to achieve here..