Hi Roland, Andrew,
as soon as I saw the tutorial, I thought the same thing: use transmission to get a faux shadow that looks like it’s a reflection.
The expression for having the shadow fall towards the camera by having a spotlight orbit inverse to the camera is not that hard.
Fact is however, you just don’t get what you want:
the shadow always radiates out from the ‘casting layer, instead of being parallel like a reflection would, a nice effect, but it definitely doesn’t sell as a reflection.
cheers,
Filip
btw, here’s the expression:
code for the position of a spotlight:
poi=thisComp.layer("Camera 1").pointOfInterest;
campos=thisComp.layer("Camera 1").position;
p=2*poi-campos;
[p[0],campos[1],p[2]];
the point of interest of the spotlight should be the same as that of the camera:
thisComp.layer("Camera 1").pointOfInterest