🚀 go-pugleaf

Hello,
   I have to do a sequence where the camera is flying along in z space, there are loads and loads of layers of footage, the camera will stop and view one then move on to the next.
  The previous post used this expression

minDist =1500;
maxDist = 3000;
maxT = 90;
minT = 15;
l = length(position,this_comp.layer("Camera 1").position / 2);
ease_out(l,minDist,maxDist,maxT,minT)

which is fantastic, I have also applied it to a venetian blind transition so that when the camera is really close it disolves into nothing...

however.. I am having trouble with the opacity.

what I am after is when it is really far away lets say 2000, the opacity is 0 when it gets to 1000 it is 90%, but when it is 250 I want it to be 15% opacity.

I would imagine this has something to do with the falloff but I cant for the life of me work it out !!!!

any ideas would be greatly appreciated

regards

Alex

sorry about the long post !!!