In ILLUMINE, MIDI PC messages circumvent the Preset Morph (smooth transition) functionality. This is intentional due to architectural constraints.

Fortunately, there are a couple of workarounds that address this specifically:
  • Instead of using a MIDI PC message, use CC messages to change the 5 top-level parameters. You need only send CC messages for the parameters that are different between the two settings.
  • Instead of using a MIDI PC message, configure the preset to use expression control and select MIDI CC 11 as your expression controller. Set the .min and .max parameters as your two settings, and send CC 11 = 0 or CC 11 = 127 to change between the two settings.