Sound of Crunch and Acoustic together

Do you intend to use two different guitars/signals?

I think you best bet i to use parallel path with eg. some EQ for the "acoustic" sound, and a crunch rig for the, um, crunch sound.

I have not played with it, but you might try working with Clarity. From the manual:

Quote

Clarity
“Clarity” changes the sound of the distortion in a new and unique way. Turning the “Clarity” soft knob to the right will bring the clean character of the sound into focus without lowering the amount of distortion. The distortion itself will become less forward in the mid frequencies and sound far more transparent.

I was just reading up on the Amp section else I would never have thought about this.

Not sure what else to tell you. If clarity won't work and the parallel path option won't somehow work, you may be out of luck since you can't do two rigs.

I don't believe there is any way possible to do this with just the Kemper. I do what you want ,but have to use my GR55 for the acoustic modeling tone and the Kemper for the crunch, both running into separate inputs on my CLR

Not Kemper related, but you can use a guitar with a piezo bridge (such as Parker's), or install one by yourself (see Graphtech / Fishman / LR Baggs / Schaller brands)
they are using a stereo jack so with a Y cable you can easily send the piezo signal to an amp and the pickups' signal to an other amp
you can even blend both signals

Try a stomp drive with mix not at 100% of you use firmware 4.0.

If you're playing an acoustic you could probably turn up the Direct Mix in the Amp section for that Trevor Rabin kinda vibe?

You're kinda looking at bi-amping / two profiles so which isn't an option.

You could take the direct signal line out and run that into an Acoustic Sim I guess. not ideal though

IIGYR you want the two tones to be mixed together and play together?
Of course you can't run two profiles in parallel, but I'd try with an acoustic simulation (to be chosen carefully), and an overdrive and an EQ in the Parallel path. With some work the PP should give you a convincing crunch. Also choose the PU which best suits this rig.

Try "PTS-TWO GUITARS" on the Rig Exchange. It is a Clean guitar and a dirty guitar. You may be able to modify the clean guitar to sound more acoustic.

Is that by you Paul?