An adjustment layer composites all the layers beneath it into one frame before adding the effects applied to the adjustment layer. In your case the background will be effected just like the other layers.
help (my English is nos so good)
Can you explane more easy!
Or place a sample?
Thanks for so far
but my problem is I run a script
that add a solid layer and if i run i, it wil always beplaced on top how can i give the position of the layer? (in my script?)
the script is as follow:
mySolid = myComp.layers.addSolid([0,0,0], "colorCorrect", myComp.width, myComp.height,4);
mySolid.adjustmentLayer = true;
myEffect = mySolid.property("Effects").addProperty("Fast Blur")("Blurriness").setValue(61);