You would think I would understand this stuff by now but it still does my head in.
I have a parent comp "Main" that has a control null "Control Null". In a nested pre-comp that has been scaled in the parent comp I have a text layer "Text" that I would like to be able to control it's transform properties with the control null in the parent comp but no matter what combo of toWorld, etc I try I can't get it to work. Any help would be much appreciated.
It can get complicated. You need to do it in two steps. Say you have have a Point Control on your null that you want to use to control the position of the text in the sub-comp. First you need to get the Position Control into the main comp's world space. Then you need to translate that result to the layer space of the sub-comp as a layer in the main comp. Like this: