I have a question is like I make a mask attribute by geometryVop and then use that mask to control the popdrag, but it doesn't work , why? the vex : airresist *= @mask11*1; once I disable the VEXepxression or airresist *=10 or 100, it can work ,but it can't recognise the mask attribute,and I also check the resule of the sim, I can see the correct mask attribute with color node