Opacity not working in Master Properties
I have a pre-comp that has 2 layers in it. One graphic, the other text. I use OPACITY from both layers as a means to control in the MAIN layer as a Master Property. However, when I attempt to change the OPACITY from the MASTER PROPERTY it does not work, respectively
This is a known issue (see https://helpx.adobe.com/after-effects/kb/known-issues-after-effects-cc.html) and will be considered for a future release.
I believe I've figured it out. It does not seem to work when the COLLAPSE TRANSFORMATION is on the Pre-Comp within the MAIN. When I turn it off, it works
The project is here: https://app.box.com/s/fs3ha57bgli4djvacvd3fqourbxmlpjl
There are no expressions. Only 2 keyframes. I'll give it a shot to post...standby
Do either of the Opacity properties have expressions applied? Master Properties override the base value of the property, which won't have an effect if the expressions don't actually use that value. To have an effect on the pre-comp's layers you need to either override the expression on the master property, or make the expression use the value.
If these properties are not using expressions, can you post the project somewhere so we can look at it?