Need help with UVewa undistort>redistort flow

[cnoellert]

@c64

Have I set this up correctly? When I difference matte, the source and result match perfectly in the centre of the shot, but there is an area around the edge that is missing in the result (black area in screenshot). What am I missing here?

The stmap node makes a lot of these headaches go away. If you don’t have it for some reason though…

ST Maps for undistort

@johnt, here you go. I also simplified it even further…