Hi,
Here is a partial fix of #188814: object carrying a turbulence are now tranfsormed correctly.
(they used to become more transparent).

I have been looking at other effects that do not render properly when transformed, but I need help about the code:
can someone help me with "area_enlarge"?
-is the area in display coordinates?
-how to interpret the filter parameters (for instance scale for displacement map) in these coordinates?

Thanks, jfb.