To be fair, it's the same with any VST I use. In my experience, there's almost no instrument I don't end up using various different reverb types, until I find the particular thing I'm aiming for.
I encourage anyone who is thinking about these things to dip a toe or two into a search for a DAW to become familiar with. Remember, it doesn't need to be all learned in a day. Take time - enjoying the process can be a good thing, not a burden, for any musician.
In a DAW, it can be something you get used to. May seem arcane - but following steps through, then standing back and giving it a think through.. you'll wonder why you didn't do it from years back.
I'd recommend this kind of ideal *using hopefully the kind of wording you see in most DAWs..
1
In a new project, insert Pianoteq onto a track. Disable it's internal reverb (Which I actually really like BTW for recordings - but also love other reverbs too).
2
Next, look for a "mix" view for that track.. some DAWs show it by default, other might need you to click a button to open the mix or 'console' view. You'll know it by seeing a "fader", like on studio 'desks/consoles'.
3
When the track's mix view is visible, look for "send".. click a selector like a plus sign, or down arrow to display "destinations" to send to (most open a little menu).. and you should be able to select something like "add FX channel". (for this, don't create or add a new bus channel or master etc. - FX is ideal).
So now, where the "mix" area is, you should see a new 'fader' like the first (maybe a different color).
What's now happening, is that Pianoteq on your "track" is sending a default signal into an FX "return" channel. Congrats!
So, maybe you guessed the next move - adding a reverb of choice in the FX channel.
4
Your DAW will have similar ways to do it. You may have an FX browser built in, from which to drag and drop any FX onto the "FX channel" strip. Or you migh just click a button or icon on the FX channel which says something like "Inserts".
5
OK so now, you may hear the reverb as being too loud. You can lower the FX channel fader!
That might be fine - but there's lots else you could do with this.
Initial things you may like to check, other than just balancing the two faders include:
a
Look within your reverb settings, for "Mix".. and/or "Dry" and "Wet".. you are likely to avoid common mixing issues, and to get your best results from making it a full "Wet" setting in the reverb. You may see a dial or slider to make "Mix 100%". That way, Pianoteq has its own signal path, the FX has no "dry" Pianoteq in it.. therefore, if you put extra FX on either channel, it may be more pristine overall.
b
See if your DAW comes with an built in "widener" tool or plugin. Many DAWs might have them. I often get good results using one JUST on the FX. I've probably yammered about that for years here. In short.. if the reverb channel sounds like it is "wider" than the piano sound, it gives more sense of depth to the listener - and may also help by then also NOT needing to be so loud and therefore not interrupting "energy" from the source piano.
c
In your reverb of choice, a common basic yet quite important thing you can alter to give further depth of field, is "Pre-Delay". That means, if you hit a piano key, you don't instantly hear reverb. So, try setting pre-delay to something like 20 to 69 Milliseconds - and lower or raise until. It sounds more realistic for the perceived space.
d
Some reverbs have 'ducking' built in. You may see a on/off for it - the reverb plugin may automatically 'ride' the incoming signal so you don't need to do anything but perhaps lower or raise a 'sensitivity' slider etc.
e
Consider inserting an EQ plugin (most DAWs have internal ones for no extra cost - no need to spend lots - but do so if you find tools you can enjoy and understand better). A good starting point for altering reverb EQ, is to try lowering some bass and/or some 'low-mid'. Some EQ tools may allow you to lower parts of the whole EQ range.. you can just lower little "notches" or push up little "peaks" - or make shapes until you hear what they sound like. I often try lowering a little bump around 500Hz.. also try lowering a little bump around 150Hz, and/or around 300-ish.. every piano, every reverb and every player and piece combo may mean different things might sound best, to you in any given project. Like most things, experiment - check videos to see things like "how to remove mud with EQ".. because MOSTLY we want the reverb to NOT compete in the bass/low-mid ranges.. you may or may not find improvements by pushing more bass, or more treble.. it often works best when the reverb has "less" detail than the main piano sound, which can then "seem" more up front without having to have it, or the reverb loud.
f
Let's say that you have lowered bass in your reverb, it all sounds better, except it is now too "thin" overall. You can surprise.. compensate in Pianoteq by raising slightly some aspect which your nice basic "mix" has altered. You might return some missing 'reverb bass'.. by adding a VERY short reverb in Pianoteq, with it mixed pretty low.. this may give a nice "player bubble" of extra reverb. Always tend to "subtle" unless you're going for a wild album sound.
g
Don't overlook that you may want to "Save" your project "My first piano reverb template" or another name you want to give it of course - that way - every time you want to play Pianoteq with that same saved reverb setup, you DO NOT need to manually do all this over and over. Computers huh!
Some DAWs may allow you to "Save As" some kind of reloadable "rack".. or "template".. or maybe if you think it better, in some DAWs you might be able to just right-click on each channel's "send" widget, and select "save preset". Seems advanced, but if your DAW allows this, it just means that no matter what other project you are working within, you can make a new track and load your saved channel presets with any FX you had set as above.
Some DAWs are more flexible than others - and all this can initially seem difficult - but it's not necessarily harder than learning open and save text documents.. and your DAW may have excellent video and other assistive documentation to show you how to do this in their way.
Those are pretty good basics to consider, no matter which reverb you try - and over time (trying various plugins) you may end up purchasing many different reverbs over time, unless it's not so important to you to be often tweaking this of course.
Like Piet mentions, there are all kinds of spatialization plugins also. Your own fav sound comes from you experimenting - and some DAWs may have 'user areas' where people share crazy amounts of tips, tricks, or just "settings" you can download and install (so that like templates, or those saved channel settings, may be reloadable with a click or 2).
Right now, I can think of many other things - but they will depend on your goals. Main goal - enjoy!
Pianoteq Studio Bundle (Pro plus all instruments) - Kawai MP11 digital piano - Yamaha HS8 monitors