So I've read some similar problems/solutions to this but have been unable to find a solution for my setup.
I have a camera flying over a landscape in a sort of "birds eye view". As the landscape moves by sheep are supposed to fade in one by one. I used a fading technique I learned here:
I am currently using the Display tag along with a compositing tag to cancel out the effect of seperate parts of the sheep showing through during the fade. This technique works but does not account for the sheeps' shadows. The sheeps' shadows do fade in, but within the shadow you can see all the sheep parts casting shadows onto each other. Hope that makes sense.
I've heard about animating an objects material transparency but if there's a way to do it with the Display Tag in conjunction with the Compositing Tag that would be great, as I've already keyframed out all the fade in's for dozens of sheep.