Hi Peer,

re: array with dependency on bitmap image luminescence, that's probably something that could be done using the Node editor:

http://moi3d.com/forum/index.php?webtag=MOI&msg=9581.122
https://moi3d.com/forum/index.php?webtag=MOI&msg=9581.57
http://moi3d.com/forum/index.php?webtag=MOI&msg=7777.1642
http://moi3d.com/forum/index.php?webtag=MOI&msg=7777.1645

Or use similar functionality in Rhino's Grasshopper node editor. It's easier to get started on this in Rhino/Grasshopper because Grasshopper has better documentation and support.

- Michael