Allright... here is a trick I came up with lately to circumvent the fact that the REV2's reverb is nowhere near good enough for long-tailed ambient reverbs... we all know that it's impossible to get the decay time of the reverb long enough... the built in reverb simply does not cut it.
This irritated me a lot... mostly because I'd really like the reverbs to be part of the instrument itself...
It is possible though, to simulate a huge reverb on the REV2 with a rather simple trick, and a little sacrifice in polyphony.
Here is what you do:
1. Create whatever preset on layer A that you want... don't put any reverb on it... use the FX on layer A freely anyway you like, it's quite ok.
2. Copy layer A when you're done with it, to layer B by pressing split/stack simultanously, and then press "write".
3. Now edit layer B, and tweak the envelopes decay and release parameters to be extremely long... in essence you want a VERY long version of the sound you made on layer A before.
4. Now choose reverb as the FX for layer B, and set the decay to maximum, and the tone control to whatever you'd like (dark reverb or light or in between, your choice). Set the FX mix parameter to 100% wet.
With this setup, you will get a HUGE and very dense reverb from layer B, but you will not notice that the length comes from the very long release times since the FX is playing 100% wet.
You can now control the "mix" via Layer B's volume parameter instead to whatever amount you might want.
If you want to simulate a very long delay time before the reverb sets in (like when early reflections are gone, and the long tail gradually comes in), then simply adjust layer B's attack rates on the envelopes to your taste.
Actually you can go even further by transposing the reverb up an octave (transpose the sound in the oscillator section)... that gives an almost kind of "frozen" shimmer reverb quality to the verb.
If you want the verb more modulated, simply put some vibrato on the sound in layer B and you'll get an insane wash of verb
The only drawback is that you have only 8voices since you must do this with stacked mode, but it really is not a big deal because the 100% wet reverb blurrs any voice stealing so much it's practically impossible to detect it, and the sounds you'd want to have on layer A would be short decaying sounds in most cases, which do not require more than 8 voices of polyphony... reverb on pads that sound all the time anyway is not as effective as one would believe since we normally notice the effects of a reverb mostly when the sound has ceased to sound.
here is an example i just did:
http://razmo.ziphoid.com/FakeVerb.mp3...and yes... the above example is 100% REV2 ... no external verbs or anything... just your good ol' REV2 doin' it's thing