HSV hue shifting is a pretty standard effect... but I've looked several times at the help browser in the Gem folder, and I see nothing for this. Maybe there's a hack with colormatrix but I don't quite have time to work it out.

Just curious. It isn't essential.

hjh

It should be possible to use freeframe or Frei0r plugins in Gem for that task... but some plugin works, other don"t.

@60hz Ah OK, forgot about those. Thanks!

hjh

Hey, I've had decent results converting to hsv using pix_rgb2hsv, then using pix_offset, then converting back using pix_hsv2rgb. I'm using it in a video feedback patch so I can't speak for how well it works on static images, but using very low values produces a consistent hue shift effect when continuously processing a video feedback line.