Hi there!
I thought I'd ask about something that has puzzled me for a while. Whenever I use the displace blend mode on a layer, it only has an effect on the layer beneath it if I set it to about 25% visibility. Anything above that, and the 'blend mode layer' works just like 'add' – it just appears on top of the layer below. This means that whenever I use the displace blend mode, I have to clearly label it "DISPLACE" in my composition, so I can remember to not turn it fully on.
I would've thought that perhaps setting the opacity of the clip to 25% would do the same job, but alas, this does not work. (It would've been nice to be able to animate the effect with the opacity parameter).
Have I misunderstood how the displace blend mode works?