[Dean Morgan]

I thought that might be the case so I checked that the start time matches up, everything seemed fine so just to be safe I removed the time mapped precomp and then added it again and set up the time remapping from scratch.

Had no joy with that though so I tried your expression and again I had no joy with that also.

However if I go into the precomp and make that the same length as the comp that contains it, and remove the time remapping from it everything works fine.

I understand that I could use this as a workaround but I have come across this problem & workaround before and I could really do with figuring out exactly what it is I am doing wrong so I can avoid it happening in future.

I can provide screenshots, or even upload the project file if it will help someone to help me figure out what is going wrong.

Thanks for your reply though Dan, it is appreciated.

[Dean Morgan]

I actually figured this out just now after a bit more reading…

On one layer I used the following expression

100-thisComp.layer("Transparency Switch").effect("Slider Control")("Slider")

and on the other I used the simple

thisComp.layer("Transparency Switch").effect("Slider Control")("Slider")

I knew it should of been dead straight forward but I couldn’t find any basic help on expressions, so my second question still stands.

Can anyone hook me up with some dead simple guides for working with expressions?

[Dean Morgan]

My bad, first time posting on here and hadn’t noticed that the AE forum was broken into various categories.

Will pay more attention in future 🙂