There are few map blending variables, one of them (let's call it 'main') 'blends' 12 pairs of maps in my A8DH100F:
- Target Boost
- Initial Wastegate Duty
- OL Primary
- OL Failsafe
- Base Timing
- Timing Advance
(other 6 undefined).
Except it doesn't really blend - one map in pair is unused 2x2 map
There is also map ratio variable for DBW tables and another one, AVCS related.
I have slowly moving project - use OEM map blending to switch maps.