Still need some help.. Please!

Question

I´ve tried to do the tree component transparent so that
I can see the background thru it but it doesn´t seem to work.
Do any one know how to do??

Answer 1

cSource3D=thisComp.layer("Light"); //reference a 3D light as source
cSource2D=cSource3D.toComp([0,0,0]); //convert to screen coordinates
cMiddleX=thisComp.width*0.5; //midpoint X
cMiddleY=thisComp.height*0.5; //midpoint Y
cDiffX=cSource2D[0]-cMiddleX; //position difference X
cDiffY=cSource2D[1]-cMiddleY; //position difference Y
cAngle=Math.atan2(cDiffY,cDiffX); //find angle
cOffset=200; //distance from middle
X=cMiddleX+Math.sin(cAngle)*cOffset;
Y=cMiddleY+Math.cos(cAngle)*cOffset;
[X,Y]
Yes, simply copy&paste the above code ( I corrected the typos) to your secondary element and adjust the cOffset variable to suit (you could tie it to a slider, if needed; negative values move in opposite direction). Make sure to adjust the reference to the light in your comp (or your 3D Null). If you use an expression Point control or the Lensflare effect on a solid, you don't need the first line and the second line would then look something like that:
cSource2D=thisComp.layer("Lensflare").effect("Lens Flare")("Flare Center")
Mylenium