Hello, everyone. Is it possible in Manifold 9 to use a rectangle matrix filter in a raster operation (in addition to the cross, circular, square and diamond options)?

Not sure I understand, but it might help to check out the "Specifying New, Custom Filters" section in the SQL Example: Process Images with 3x3 Filters example topic.

Hello, Dimitri. Thanks for your reply. I was familiar with that section's information, but I ended up being misled by a flaw in a methodology that indicated a 4x3 matrix. It turned out to be a mistake, so this thread can rest in peace.