the functions arent directly midi mapped -

in the real world - midi is a hopeless way of controlling this stuff.
triggering stuff from notes and things is fine - but more than that is not worth the effort.

one of the main problems being the default limited resolution of midi controllers is only 7 bits - 0-127 - and dmx is 0-255.
with double byte controllers - the resolution is only 14bit ( 0-16383 ) with dmx 16bit

but i do try to use certain aspects of midi with certain controllers - like the mackie controllers -
the bcf 2000 can operate layer faders.