MAPPXT is a free 2D prediction program from Meyersound, that give very precise predictions of the Meyer speaker range in a 2D environment. One can put in walls and absorption elements, but it has some limitations in the geometry of the spaces one can build. Still one can use MAPPXT to check out interaction between loudspeakers and (sub) arrays. There is a direct connection to the Galaxy and Galileo processors from Meyersound that can be inserted in the setup and also transefered to these processors.
Still it tkaes some time to get used to the limited and old fashioned user interface. For that reason it’s important to follow some tutorials.