Re: Using footage luma value to drive opacity of effect

This expression is crashing my CS6. Everytime I apply it.
Is anyone else having this problem? Is there a difference in language for CS6? or alternative expression I could use?


target = thisComp.layer("Candle"); // this would be your footage layer
maxO = 100; // set the max opacity value
minO = 0; // set the min opacity value
lum = rgbToHsl(target.sampleImage(anchorPoint, radius = [target.width/2, target.height/2], postEffect = true, t = time))[2];
linear(lum, minO, maxO)