Here you can assign any capsule to any output with different levels and polarity. IOW: You can create five capsules and assign them to the two stereo outputs, for example.
But if I want to create five capsules and assign them to three outputs? If I want to create five capsules and assign them to five outputs?
Reaper is ready to receive any number of outputs MIR decides to send it. The hard part is getting MIR to send the number of outputs I want it to send. The "Matrix" tab doesn't allow me to set the number of outputs -- the Matrix tab tells me it's sending two outputs ("OutputL" and "OutputR") and that's the end of it.
Now I've resorted to experimenting with the undocumented "Force output channels" setting, and as a result, MIR no longer opens in my DAW. This is just going downhill, so I'll give up and use a different product for room-simulation.