Is it just me or is it not possible to select multiple layers and change their material options like specularity and shininess all at once? Selecting the layers and clicking on cast shadows certainly does work like this, but for some reason when I do the same and change the specularity, it changes only for that layer, regardless of the selection for the other layers.
Are you able to change material options for multiple layers in one click?
Works for me... Not sure what else to say. The only thing to consider would be that you need to expose the same properties on all layers or else AE can't match the property streams, so it may be advisable to hit AA to expose all material options instead of just U or UU to reveal changed/ animated properties.
Ok good to know it should work! I just need to troubleshoot then.